Popular Comparisons:
⚡3-Second Selection Verdict
Daily & TestsPick Claude Sonnet 5 (Save 50%)
Complex Refactor/AgentsPick Claude Opus 5.5 (CursorBench +23.7 pts)
AnthropicVerified

Claude Sonnet 5

★ Save 50%
Input$2.00 / 1M
Output$10.00 / 1M
Context1M
CursorBench Pass Rate34.1%
AnthropicVerified

Claude Opus 5.5

★ 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 Sonnet 5$40.00
Claude Opus 5.5$80.00

Context capacity · tokens (not recall accuracy)

Claude Sonnet 51,000,000
Claude Opus 5.51,000,000

CursorBench 4.0 · %

Claude Sonnet 534.1%
Claude Opus 5.557.8%

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

CursorBench · 2026-09-22 ↗
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 Sonnet 5 vs Claude Opus 5.5
Slot 1Anthropic
Slot 2Anthropic
Slot 3
Claude Sonnet 5 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 Sonnet 5
$40.00/ mo
(in: $2 + out: $10)
Claude Opus 5.5
$80.00/ mo
(in: $4 + out: $20)
AttributeClaude Sonnet 5AnthropicClaude Opus 5.5Anthropic
Input$2.00$4.00
Output$10.00$20.00
Context1M1M
CursorBench Pass Rate34.1%57.8%
StatusVerifiedVerified
Tags & CapabilitiesBalanced, Coding, Vision, Adaptive thinkingNew, Flagship, Reasoning, Coding, Agentic, Adaptive thinking, SOTA
LMArena Code#29#1
LMArena Agent#12#1
CursorBench#9#1
Artificial Analysis#27#1
Vals AI#19#3
LiveBench#25#2
LMArena Text#33#2
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