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Comparison of Anthropic: Claude Sonnet 5.5, OpenAI: GPT-6.1 Sol
2 modelsanthropicAnthropic: Claude Sonnet 5.5Remove ×openaiOpenAI: GPT-6.1 SolRemove ×
What’s differentTuned for quick iteration on scoped fixes and documents; Anthropic favors Opus 5.5 for open-ended work needing sustained judgment.Requires Responses API for tools; offers Ultrafast inference with US or EU data residency.
DateSep 28, 2026ReleasedSep 29, 2026Released
Listed rate$2.00 in / $10.00 out/ 1M tokensAmazon Bedrock · via OpenRouter · all routes ↗amazon-bedrock$1.00 in / $5.00 out/ 1M tokensOpenAI · via OpenRouter · all routes ↗openai/flex · tier=flex · prompt ≤ 272000 tokens
Provider endpoints11 endpoints →10 endpoints →
AA Intelligence ↗4.3.256 ↗Effort: max · Max, Default FallbackIndependent result51.83 ↗Effort: max · MaxIndependent result
AA-Briefcase ↗1.11,817.26 ↗Effort: max · Max, Default FallbackIndependent result1,557 ↗Effort: max · MaxIndependent result
GDPval-AA ↗2.11,837.82 ↗Effort: max · Max, Default FallbackIndependent result1,593.85 ↗Effort: max · MaxIndependent result
AutomationBench-AA ↗AA Index 4.3.2 collection71.77% ↗Effort: max · Max, Default FallbackIndependent result64.87% ↗Effort: max · MaxIndependent result
Terminal-Bench 4.0 · AA ↗63.64% ↗Effort: max · Max, Default FallbackHarness unreportedIndependent result56.06% ↗Effort: max · MaxHarness unreportedIndependent result
SciCode ↗AA Index 4.3.2 collection61% ↗AA · Under reviewEffort: max · Max, Default FallbackIndependent result54.17% ↗AA · Under reviewEffort: max · MaxIndependent result
Humanity’s Last Exam ↗AA Index 4.3.2 collection54.96% ↗Effort: max · Max, Default FallbackIndependent result52.92% ↗Effort: max · MaxIndependent result
GDP.pdf ↗AA Index 4.3.2 collection25.8% ↗Effort: max · Max, Default FallbackIndependent result31% ↗Effort: max · MaxIndependent result
CritPt ↗AA Index 4.3.2 collection31.43% ↗AA · Under reviewEffort: max · Max, Default FallbackIndependent result31.71% ↗AA · Under reviewEffort: max · MaxIndependent result
AA-Omniscience ↗AA Index 4.3.2 collection32.3 ↗Effort: max · Max, Default FallbackIndependent result41.53 ↗Effort: max · MaxIndependent result
AA-LCR ↗1.182.67% ↗Effort: max · Max, Default FallbackIndependent result83% ↗Effort: max · MaxIndependent result
LiveBench ↗2.0 · 2026-10-14 (dataset 2026-09-02)82.46% ↗Effort: max · single run · equal mean of 7 suitesIndependent result85.41% ↗Effort: max · single run · equal mean of 7 suitesIndependent result
LiveBench Design ↗2.0 · 2026-10-14 (dataset 2026-09-02)85% ↗Effort: max · single runIndependent result82.1% ↗Effort: max · single runIndependent result
LiveBench Research ↗2.0 · 2026-10-14 (dataset 2026-09-02)83.6% ↗Effort: max · single runIndependent result83.5% ↗Effort: max · single runIndependent result
LiveBench Browser Use ↗2.0 · 2026-10-14 (dataset 2026-09-02)84% ↗Effort: max · single runIndependent result88% ↗Effort: max · single runIndependent result
LiveBench Coding ↗2.0 · 2026-10-14 (dataset 2026-09-02)94.7% ↗Effort: max · single runIndependent result96% ↗Effort: max · single runIndependent result
LiveBench Agentic ↗2.0 · 2026-10-14 (dataset 2026-09-02)78.8% ↗Effort: max · single runIndependent result73% ↗Effort: max · single runIndependent result
LiveBench Data Analysis ↗2.0 · 2026-10-14 (dataset 2026-09-02)59.5% ↗Effort: max · single runIndependent result82.7% ↗Effort: max · single runIndependent result
LiveBench Reasoning ↗2.0 · 2026-10-14 (dataset 2026-09-02)91.6% ↗Effort: max · single runIndependent result92.6% ↗Effort: max · single runIndependent result
Context window1M1.1M
Max output128K128K
Parameters——
Tool callingSupportedSupported
Structured outputSupportedSupported
Image inputSupportedSupported
ReasoningSupportedSupported
Prompt cachingSupportedSupported

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