Popular Comparisons:
⚡3-Second Selection Verdict
Daily & TestsPick Claude Opus 5.5 (Save 60%)
Complex Refactor/AgentsPick Claude Opus 5.5 (CursorBench +6.0 pts)
AnthropicVerified

Claude Fable 5.1

Input$10.00 / 1M
Output$50.00 / 1M
Context1M
CursorBench Pass Rate51.8%
AnthropicVerified

Claude Opus 5.5

★ Save 60% ★ Score Leader (57.8%)
Input$4.00 / 1M
Output$20.00 / 1M
Context1M
CursorBench Pass Rate57.8%

Pick your workflow, then your budget

Estimates use our price snapshot, excluding cache, retries, taxes and tools. Check availability for preview and legacy models.

Workload cost · USD (lower costs less)

Claude Fable 5.1$200.00
Claude Opus 5.5$80.00

Context capacity · tokens (not recall accuracy)

Claude Fable 5.11,000,000
Claude Opus 5.51,000,000

CursorBench 4.0 · %

Claude Fable 5.151.8%
Claude Opus 5.557.8%

Tool reliability, long-context recall and same-harness SWE-bench: untested, not zero.

CursorBench · 2026-10-07 ↗
Patch review example: why does an empty array slip through?

Editorial example, not measured model output. Review boundary contracts and regression tests; this is not a model ranking.

export function mean(values: number[]) {
  return values.reduce((a, b) => a + b, 0)
    / values.length;
}

// mean([]) => NaN
// Missing an explicit empty-input contract
⚙️ Select ModelClaude Fable 5.1 vs Claude Opus 5.5
Slot 1Anthropic
Slot 2Anthropic
Slot 3
Claude Fable 5.1 VS Claude Opus 5.5
💳 View Plans↗

💰 Monthly Cost Simulation

Simulate monthly cost differences based on your estimated token usage volume

Monthly Input Tokens (Prompt)10 M tokens
Monthly Output Tokens (Completion)2 M tokens
Claude Fable 5.1
$200.00/ mo
(in: $100.00 + out: $100.00)
Claude Opus 5.5
$80.00/ mo
(in: $40.00 + out: $40.00)
AttributeClaude Fable 5.1AnthropicClaude Opus 5.5Anthropic
Input$10.00$4.00
Output$50.00$20.00
Context1M1M
CursorBench Pass Rate51.8%57.8%
StatusVerifiedVerified
Tags & CapabilitiesNew, Flagship, Reasoning, Vision, Adaptive thinking, SOTA, CodingNew, Flagship, Reasoning, Coding, Agentic, Adaptive thinking, SOTA
LMArena Code#5#1
LMArena Agent#3#1
CursorBench#4#1
Artificial Analysis#4#1
Vals AI#4#3
LiveBench#1#2
LMArena Text#5#2
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