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AI Coding Live News

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Anthropic (Claude Help Center)support.claude.com·
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Anthropic extends Claude text watermarking to older models including Mythos 5, Opus 4.7/4.6 and Sonnet 4.6, reportedly from November 3

Anthropics help center article "How Claude marks AI-generated content" (updated Oct 28) now lists older models released before Aug 2, 2026, including Claude Mythos 5, Opus 4.7, Opus 4.6, Opus 4.5, Sonnet 4.6 and Sonnet 4.5, as carrying text watermarks on first-party surfaces, and says Anthropic is adding watermarks to these models to meet EU AI Act Article 50 transparency duties. According to a customer email screenshot reported by outlets such as MACCUS, the legacy rollout starts Nov 3, with Amazon Bedrock possibly a few days later; Anthropics public pages do not state that date. The watermark follows Google DeepMinds SynthID-Text approach, adds no hidden characters or extra tokens, and detection is in private preview only for regulators, media, researchers and similarly obligated organizations, which has drawn complaints on X that users cannot check their own text.

Anthropic extends Claude text watermarking to older models including Mythos 5, Opus 4.7/4.6 and Sonnet 4.6, reportedly from November 3

Key Takeaways

  • Scope: in the official support table, older models such as Mythos 5, Opus 4.7/4.6/4.5 and Sonnet 4.6/4.5 are ticked only for first-party text watermarks; cloud-partner watermarks and C2PA file credentials remain limited to models launched after Aug 2 (see the help center)
  • Timing: a customer email reported by media puts the start at Nov 3, with Bedrock possibly a few days later (MACCUS); Anthropics public pages give no date
  • Cost and quality: Anthropic says the watermark adds no characters, no extra tokens and no extra cost, using a variant of SynthID-Text (see Anthropics explainer)
  • Detection: the detection API is in private preview for regulators, law enforcement, media, fact-checkers, researchers and obligated enterprises; ordinary users cannot check text yet
  • Reach: watermarks apply worldwide across Claude, the Claude Platform API, Claude Code, Cowork and Tag, because Anthropic says it has no durable way to scope them by region yet
Read full story
Linked Models & Agents:
⚡ Claude Mythos 5⚡ Claude Opus 4.7⚡ Claude Opus 4.6⚡ Claude Sonnet 4.6⚡ Claude Opus 5.5🤖 Claude Code (Anthropic)🌐 Anthropic🌐 Google DeepMind🌐 Amazon
#Watermark#SynthID-Text#EU AI Act#Article 50#C2PA#Claude#Compliance#AI detection
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Bill Staples@bstaples·
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GitLab brings Claude Mythos 5.1 into its Business Logic Security Analyzer and offers free-credit security sprints

On Oct 28, GitLab CEO Bill Staples announced in a blog post and on X that new and existing customers can request free credits to run a security sprint with Claude Mythos alongside GitLab Orbit, Secrets Manager and Duo Agent Platform. The core capability is the Business Logic Security Analyzer, the first GitLab feature to support Anthropic's Claude Mythos 5.1. It reads the whole repository, infers what each endpoint should enforce, and flags authorization and mass-assignment flaws that pattern-based SAST misses. The analyzer has been in early access for a small group of GitLab.com Ultimate customers since Oct 20.

GitLab brings Claude Mythos 5.1 into its Business Logic Security Analyzer and offers free-credit security sprints

Key Takeaways

  • The Business Logic Security Analyzer is the first GitLab feature to support Claude Mythos 5.1; it also supports Claude Opus 5.5, Sonnet 5.5, Sonnet 5 and Sonnet 4.6, all as GitLab-managed models via GitLab's AI gateway
  • It starts with three flaw classes: broken object-level authorization (BOLA), missing or improper authorization, and mass assignment
  • Scans can run on the whole repository from Duo Chat or the API, or automatically on each merge request after its pipeline passes; findings land in the Vulnerability Report and MR security widget as SAST results
  • Early access is limited to a small group of GitLab.com Ultimate customers; each scan consumes GitLab Credits, with cost scaling with the application's attack surface
  • New on Oct 28: a security sprint offer where qualifying teams can request free credits for Ultimate, Duo Agent Platform, Orbit and Secrets Manager
Read full story
Linked Models & Agents:
⚡ Claude Mythos 5.1⚡ Claude Opus 5.5⚡ Claude Sonnet 5.5🤖 GitLab Duo Agent Platform🤖 Business Logic Security Analyzer🌐 GitLab🌐 Anthropic
#GitLab#Claude Mythos#application security#SAST#BOLA#agentic remediation
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AnthropicAnthropicAI·
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Anthropic: Claude Mythos 5 designs quantum circuits in an evaluator loop, beating best published designs on 8 tasks and cutting a DQI decoder's gates 12x

Anthropic published STEM Fellows research on Oct 16: given plain-language specs plus an automated evaluator that verifies correctness and scores qubits x gates, Claude Mythos 5 found quantum-circuit designs that beat the best published ones across eight primitives in chemistry, optimization, simulation and number theory. On elliptic-curve point addition it worked 53 hours with minimal human input and produced the first reversible divsteps modular inversion with no stored branch history; for decoded quantum interferometry it cut Reed-Solomon decoder gates about 12x versus Google's prior construction. Paper: arXiv 2610.22367.

Anthropic: Claude Mythos 5 designs quantum circuits in an evaluator loop, beating best published designs on 8 tasks and cutting a DQI decoder's gates 12x

Key Takeaways

  • Beat the best published designs on all 8 quantum-circuit primitives; the paper says 7 of 8 cut both Toffoli and qubit counts (arXiv 2610.22367)
  • Point addition: 53 hours of largely autonomous work yielded the first reversible divsteps modular inversion with no stored branch history, formalized in Lean
  • One design in the new family uses 12% more qubits but 17x fewer gates than the smallest previous design
  • DQI Reed-Solomon decoder: ~12x fewer gates than Google's prior construction; 403M sampled decodings shrank a 665-qubit worst-case reserve to 19 qubits (~1-in-10,000 failure)
  • Reusable pattern: LLM writes Python circuits, an independent evaluator verifies and scores qubits x gates, and the loop runs without human input between rounds
Read full story
Linked Models & Agents:
⚡ Claude Mythos 5🌐 Anthropic🌐 Harvard University🌐 QuEra Computing
#Anthropic#Claude Mythos 5#AI for Science#arXiv
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Chainguard@chainguard-dev·
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Chainguard ships three agent-security products: Harness runs Claude Mythos 5.1 vulnerability hunts for you, Checks turns CI into an agent-callable pre-commit check, Workspaces adds microVM sandboxes

On 2026-10-14 Chainguard launched Harness, Checks, and Workspaces. Harness has Chainguard staff run Claude Mythos 5.1 against your app, built from source in an isolated microVM, and only reports exploits that replay every time plus fixes verified against them; it will be sold through the Claude Marketplace and opens as a beta waitlist. Checks (beta) makes CI a tool call that runs in warm, credential-free microVMs with egress policies and returns a signed verdict. Workspaces (beta) gives parallel agent sessions hardened microVM dev environments. Both betas come with a 30-day free trial.

Chainguard ships three agent-security products: Harness runs Claude Mythos 5.1 vulnerability hunts for you, Checks turns CI into an agent-callable pre-commit check, Workspaces adds microVM sandboxes

Key Takeaways

  • Harness: Chainguard staff operate Claude Mythos 5.1, so customers need no model access; an exploit only makes the report if it replays every time in a fresh microVM, each fix must make it fail, and a named engineer signs off
  • Harness will be purchasable on the Claude Marketplace against existing Anthropic commitments; limited beta waitlist for now (per Chainguard)
  • Checks beta: config in .chainguard/ci/*.yaml, drafts generated from existing GitHub Actions via chainctl; runners hold no credentials, a host-side proxy injects short-lived ones in flight
  • Workspaces beta: chainctl develop opens a remote microVM; while waiting on a developer it stays live 10 minutes, then snapshots and stops compute
  • Both Checks and Workspaces have a 30-day free trial; Chainguard published no speed or detection-rate numbers
Read full story
Linked Models & Agents:
⚡ Claude Mythos 5.1🤖 Claude Code🤖 Chainguard Harness🤖 Chainguard Checks🤖 Chainguard Workspaces🌐 Chainguard🌐 Anthropic
#Chainguard#Claude Mythos 5.1#Claude Marketplace#agent security#CI#microVM#Sandbox#vulnerability hunting#supply chain
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Anthropic@AnthropicAI·
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Anthropic Cyber Mission: free OSS Scanner reports 77 critical and 803 high findings in its first week, plus Critical Infrastructure Defense with 11 partners

On Oct 8 Anthropic launched the Cyber Mission: (1) free opt-in OSS Scanner for critical open-source projects using strongest models including Claude Mythos, with PoC/explanation/candidate patches and >90% expected true-positive rate, no human triage; (2) Critical Infrastructure Defense Program with 11 founding partners including CrowdStrike, Palo Alto, Dragos, and Rockwell. Project Glasswing has surfaced 29,000+ candidate vulns. Oct 19 update: first scans have reported 77 critical and 803 high model-rated findings to maintainers; curl 8.23.0's high-severity HTTP/2 use-after-free CVE-2026-92392 was found by an early version.

Key Takeaways

  • Two tracks: free opt-in OSS Scanner (model-only reports) + Critical Infrastructure Defense Program (OT/power/water/transport; 11 founding partners)
  • Glasswing legacy: 29,000+ candidate vulns, ~6,000 human-triaged; ~5,000 reports sent when maintainers asked for bulk
  • Quality bar: 88% of 97 critical/high samples met CVD bar; expected true-positive >90% (no human review; severity can be off)
  • Enroll: core maintainers PR into Anthropic’s enrollment repo; also Claude for OSS free Max + Cyber Verification Program
  • First week (vendor-reported, model-rated, unreviewed): 77 critical and 803 high findings sent to maintainers; curl 8.23.0 fixed CVE-2026-92392 (HTTP/2 upload use-after-free, 8.12.0–8.22.0) found by an early version
Read full story
Linked Models & Agents:
⚡ Claude Mythos⚡ Claude🌐 Anthropic🌐 CrowdStrike🌐 Palo Alto Networks🌐 Dragos🌐 Rockwell Automation
#Anthropic#Cyber Mission#OSS Scanner#Glasswing#Security#Open source#Curl#CVE-2026-92392
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AnthropicAnthropicAI·
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Anthropic expands its Cyber Verification Program into three access tiers with Opus 5.5, Sonnet 5.5 and Mythos 5.1; Red Team tier completes 34/50 CyScenarioBench tasks with zero blocks

On 2026-10-06 Anthropic merged Project Glasswing and the original Cyber Verification Program into one three-tier program: Defense Access (SOC, incident response, malware reversing, vuln validation), Red Team Access (authorized pentesting) and Specialized Access (safety-critical systems such as power grids, flight systems and telecom, vetted with the US government). All tiers get Claude Opus 5.5, Sonnet 5.5 and Mythos 5.1 with reduced cyber blocking. On CyScenarioBench, GA models were blocked on the first prompt of every task, Defense tier blocked 46/50 trials, and Red Team tier had zero blocks and completed 34/50 (matching the 67.6% no-safeguard rate). Glasswing partners reported at least 129,000 verified vulnerabilities from April to July 2026.

Anthropic expands its Cyber Verification Program into three access tiers with Opus 5.5, Sonnet 5.5 and Mythos 5.1; Red Team tier completes 34/50 CyScenarioBench tasks with zero blocks

Key Takeaways

  • 3 tiers: Defense (decisions in days), Red Team (weeks, organizations only), Specialized (in-depth review with the US government); Glasswing members move to Specialized automatically (announcement)
  • 3 models in every tier: Claude Opus 5.5, Sonnet 5.5 and Mythos 5.1, plus future models
  • CyScenarioBench (10 tasks x 5 attempts): GA blocked on first prompt; Defense tier blocked 46/50; Red Team tier 0 blocks and 34/50 completed, matching the 67.6% no-safeguard rate
  • Impact: at least 129,000 verified vulns found by Glasswing partners (Apr-Jul 2026) plus 5,500 from Anthropic's own OSS scanning (Apr-Oct), over 33,000 rated critical/high (Project Glasswing)
  • Available on Claude Platform, Vertex AI and Microsoft Foundry; Bedrock only for Enterprise Frontier Safeguards customers; data retention required
Read full story
Linked Models & Agents:
⚡ Claude Opus 5.5⚡ Claude Sonnet 5.5⚡ Claude Mythos 5.1🌐 Anthropic
#Anthropic#Cybersecurity#Cyber verification program#Project glasswing#Claude mythos 5 1#Claude opus 5 5#Red team#AI safety
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@AnthropicAI@AnthropicAI·
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Anthropic opens Life Sciences Verification Program with first access to Mythos

Anthropic opened applications for the Life Sciences Verification Program (LSVP), letting life science professionals use its models—including Mythos for the first time—with new safeguards designed for biology work. The program launches in beta for academic labs, startups, pharma companies, and other teams, with plans to expand access to individual Pro and Max plans over time.

Key Takeaways

  • Anthropic opened applications for the Life Sciences Verification Program (LSVP), letting life science professionals use its models—including Mythos for the first time—with new safeguards designed for biology work. The program launches in beta for academic labs, startups, pharma companies, and other teams, with plans to expand access to individual Pro and Max plans over time.
Read full story
Linked Models & Agents:
#AI#LLM#Coding
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Anthropic@AnthropicAI·
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Anthropic Opens Singapore APAC Hub, Appoints ASEAN GM to Drive Enterprise Scale

Anthropic announced the opening of its APAC headquarters in Singapore, appointing Dale Finlay as General Manager for ASEAN. The hub will serve financial institutions, governments, and engineering teams, scaling enterprise deployments of Claude Fable and Mythos.

Key Takeaways

  • Establishes Singapore APAC headquarters to spearhead ASEAN enterprise adoption
  • Tailors local regulatory compliance and enterprise support for finance and defense tech
  • Intensifies global commercial footprint expansion alongside frontier peers
Read full story
Linked Models & Agents:
⚡ Claude 5.1🌐 Anthropic
#Anthropic#Singapore#APAC Expansion#Enterprise AI#Global AI
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Ars Technica@arstechnica·
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Ars: Rare overlapping outages hit OpenAI, Anthropic, xAI, and Google Thursday morning

Per Ars Technica, cloud models from OpenAI, Anthropic, xAI, and Google saw rare overlapping disruptions over several hours Thursday morning ET. Anthropic reported elevated errors on Claude Mythos 5.1, Fable 5.1, and Opus 5 at 9:23 ET and resolved by about 12:16 ET; OpenAI reported degraded ChatGPT and Codex performance from 10:43 ET, mitigated by about 12:55 ET. xAI’s Grok showed a user-facing outage banner as DownDetector reports jumped from under 10 to about 1,365; Google did not publicly acknowledge issues, but DownDetector and StatusGator pointed to a likely Gemini API outage around 10:45–11:15 ET. AWS, Azure, and Cloudflare had no major incidents. Concurrent frontier-model downtime is almost unheard of.

Key Takeaways

  • Four frontier labs overlapped for hours—Ars calls that practically unheard of
  • Anthropic and OpenAI posted status; Grok showed user errors; Gemini mainly via third-party monitors
  • No major AWS/Azure/Cloudflare incidents—points to model stacks, not a whole-cloud collapse
Read full story
Linked Models & Agents:
⚡ Claude Fable 5.1⚡ Claude Mythos 5.1⚡ Claude Opus 5⚡ Grok⚡ Gemini🌐 OpenAI🌐 Anthropic🌐 xAI🌐 Google
#Outage#OpenAI#Anthropic#xAI#Google#Grok#Gemini#Reliability#Status
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Claude@claudeai·
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Claude Fable 5.1 and Mythos 5.1 Launch for Coding and Knowledge Work

Anthropic introduced Claude Fable 5.1 and Claude Mythos 5.1, calling them the world’s most advanced models for coding and knowledge work. Fable 5.1 is built for long-running agentic tasks and research, with cache reads 75% cheaper than Fable 5—about 25% lower cost on typical workloads and up to 45% on highly agentic ones. Cursor reported 73.4% on CursorBench 3.2 at max effort.

Key Takeaways

  • Fable 5.1 is generally available; Mythos 5.1 is limited to trusted cyberdefense and life-science access
  • Cache-read pricing down 75%, cutting agentic workload cost by up to 45%
  • Immediately live in Cursor and GitHub Copilot for long-horizon coding and research
Read full story
Linked Models & Agents:
⚡ Claude Fable 5.1⚡ Claude Mythos 5.1🤖 Claude🤖 Cursor🤖 GitHub Copilot🌐 Anthropic🌐 Cursor🌐 GitHub
#AI#LLM#Claude#Fable#Coding#Agents#Pricing
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Claude@claudeai·
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Anthropic Launches Claude Fable 5.1, the World's Most Advanced Coding Model

Anthropic launched Claude Fable 5.1 and the restricted Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 scores 55.8% on Terminal-Bench 4.0 (vs. 42.0% for Fable 5) and more than doubles Fable 5 on Terminal-Bench-Science 0.1 at 52.6%. Cache reads are 75% cheaper, cutting typical cost about 25% and highly agentic workloads by up to 45%. It is already live in Cursor (73.4% on CursorBench 3.2) and GitHub Copilot.

Key Takeaways

  • Fable 5.1 is built for long-running coding, deep codebase research, and complex agentic workflows, with fewer false refusals
  • Cheaper cache reads cut agentic cost by up to 45%, and lower-effort settings can match prior peak quality
  • Mythos 5.1 is trusted-access only, paired with Enterprise Frontier Safeguards for ZDR-plus monitoring
Read full story
Linked Models & Agents:
⚡ Claude Fable 5.1⚡ Claude Mythos 5.1⚡ Claude Fable 5🤖 Claude🤖 Cursor🤖 GitHub Copilot🌐 Anthropic🌐 Cursor🌐 GitHub
#AI#LLM#Coding#Claude#Agents#Anthropic
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GitHub@github·
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GitHub Copilot makes Claude Fable 5.1 generally available in App, CLI, and VS Code

GitHub announced Claude Fable 5.1, Anthropic’s latest Mythos-class model, is generally available in GitHub Copilot. Internal testing highlighted long-running coding, deep codebase research, and complex agentic workflows, and it is selectable in the Copilot app, CLI, and VS Code (@code).

Key Takeaways

  • Claude Fable 5.1 is GA in GitHub Copilot, not preview-only.
  • GitHub highlights long-running coding, codebase research, and agentic workflows.
  • Available across Copilot App, CLI, and VS Code for existing Copilot setups.
Read full story
Linked Models & Agents:
⚡ Claude 3.7 Sonnet (Hybrid Reasoning)🤖 Claude Code (Anthropic)🌐 Anthropic🌐 Microsoft Azure AI
#Claude Fable 5.1#GitHub Copilot#VS Code#CLI#Mythos#Anthropic#Agentic
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Claude@claudeai·
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Anthropic Launches Claude Fable 5.1, a New Peak for Coding and Knowledge Work

Anthropic released Claude Fable 5.1, plus Mythos 5.1 for cyber defenders and life scientists. Fable 5.1 scores 55.8% on Terminal-Bench 4.0 versus 42.0% for Fable 5, more than doubles Terminal-Bench-Science to 52.6%, and is Cursor’s strongest CursorBench 3.2 result at 73.4% max effort. Cache reads are 75% cheaper, cutting typical costs about 25% and highly agentic workloads up to 45%.

Key Takeaways

  • Fable 5.1 is available everywhere today as Anthropic’s most advanced coding and knowledge-work model
  • It sets a new bar on Terminal-Bench 4.0 (55.8%) and more than doubles science-terminal scores
  • Mythos 5.1 ships via trusted access; Enterprise Frontier Safeguards roll out in phases this fall
Read full story
Linked Models & Agents:
⚡ Claude Fable 5.1⚡ Claude Mythos 5.1⚡ Claude Fable 5🤖 Cursor🌐 Anthropic🌐 Cursor
#AI#LLM#Coding#Anthropic#Claude#Agent
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Claude@claudeai·
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Anthropic Unveils Claude Fable 5.1 and Mythos 5.1 for Coding and Knowledge Work

Anthropic launched Claude Fable 5.1 and Claude Mythos 5.1, calling them the world's most advanced models for coding and knowledge work. Fable 5.1 more than doubled Terminal-Bench-Science 0.1 to 52.6% and lifted Terminal-Bench 4.0 from 42.0% to 55.8%, while cutting cache-read prices 75% and typical agentic costs by up to 45%.

Key Takeaways

  • Scores 52.6% on Terminal-Bench-Science 0.1 (more than double Fable 5) and 55.8% on Terminal-Bench 4.0
  • Cache reads cost 75% less; real-world agentic workloads can drop about 25–45%
  • Fable 5.1 is generally available today; Mythos 5.1 is trusted-access, with Enterprise Frontier Safeguards rolling out this fall
Read full story
Linked Models & Agents:
⚡ Claude Fable 5.1⚡ Claude Mythos 5.1🤖 Claude Code🌐 Anthropic
#AI#LLM#Coding#Anthropic#Claude
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First Squawk@FirstSquawk·
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Anthropic launches Claude Fable 5.1; cache reads $0.25, ~25% cheaper typical jobs

Anthropic launched Claude Fable 5.1 on September 1 (API id claude-fable-5-1) for Pro, Max, Team, and Enterprise, plus the Claude API, AWS, Google Cloud, and Microsoft Foundry. List price stays $10 input / $50 output per 1M tokens, but cache reads drop to $0.25 (75% less than Fable 5), which Anthropic estimates cuts typical workloads about 25% and highly agentic ones up to about 45%. Claude Mythos 5.1 remains limited to trusted-access programs.

Key Takeaways

  • Fable 5.1 is GA for Pro/Max/Team/Enterprise and the API as claude-fable-5-1.
  • List price stays $10/$50 per 1M tokens; cache reads are $0.25, about 25% cheaper typical jobs and up to ~45% on heavy agent workloads.
  • Mythos 5.1 stays trusted-access only. Fable 5.1 targets long-horizon coding; Devin said it is moving Opus 5 traffic onto it at launch.
Read full story
Linked Models & Agents:
⚡ Claude 3.7 Sonnet (Hybrid Reasoning)🤖 Claude Code (Anthropic)🤖 Devin 2.0 (Cognition)🌐 Anthropic
#Claude Fable 5.1#Claude Mythos 5.1#Anthropic#Pricing#Cache#Agentic coding#Claude code