Cloud Opus 5.5
A flagship large language model released by Anthropic, designed for deep reasoning and complex task handling.
Timeline (last 90 days)
Gemini 4 Carbon took the top score in 15 of 17 tests, with the models compared including Argon, GPT-6, Astra and Cloud Opus 5.5.
In the Intelligence Index V5 released by Artificial Analysis, Cloud Opus 5.5 ranks first with 58 points, and DeepSeek V4.1 Flash ties for first among open-weight models with 32 points.
According to Artificial Analysis's evaluation, Gemini 4 Carbon ranks first on its intelligence index, just one point ahead of Cloud Opus 5.5.
CloscoScience recommends the master-subagent mode, with the main model being Cloud Opus 5.5 (Anthropic's current latest flagship model), sub-agents following the main model, and reasoning intensity set to high.
In a comparative test of strategy game development, Claude Opus 5.5 worked continuously for over 20 minutes and produced an in-depth game containing mechanics such as building animations and tactical logic, whereas Gemini 4 Argon gave a result after thinking for less than a minute, a notable gap.
Gemini 4 Argon lost to Cloud Opus 5.5 in Terminal Bench 4.0, and lost to GPT-6 Astra in the Frontier SWB suite.
In the Deep Study software engineering test, Argon scored 77.9%, higher than GPT-6 Astra and Claude Opus 5.5 (both approximately 74%).
Anthropic launched Claude Opus 5.5, with capabilities close to the flagship Fable 5.1, costs reduced by 40%, and output speed improved by more than 30% compared to Opus 5.
Claude Opus 5.5's boundary-violation attempts are reduced by 85% compared to the previous generation.
All Facts (8)
According to Artificial Analysis's evaluation, Gemini 4 Carbon ranks first on its intelligence index, just one point ahead of Cloud Opus 5.5.
60%UnverifiedCloscoScience recommends the master-subagent mode, with the main model being Cloud Opus 5.5 (Anthropic's current latest flagship model), sub-agents following the main model, and reasoning intensity set to high.
60%UnverifiedIn a comparative test of strategy game development, Claude Opus 5.5 worked continuously for over 20 minutes and produced an in-depth game containing mechanics such as building animations and tactical logic, whereas Gemini 4 Argon gave a result after thinking for less than a minute, a notable gap.
60%UnverifiedGemini 4 Carbon took the top score in 15 of 17 tests, with the models compared including Argon, GPT-6, Astra and Cloud Opus 5.5.
50%UnverifiedIn the Intelligence Index V5 released by Artificial Analysis, Cloud Opus 5.5 ranks first with 58 points, and DeepSeek V4.1 Flash ties for first among open-weight models with 32 points.
50%UnverifiedGemini 4 Argon lost to Cloud Opus 5.5 in Terminal Bench 4.0, and lost to GPT-6 Astra in the Frontier SWB suite.
50%UnverifiedClaude Opus 5.5's boundary-violation attempts are reduced by 85% compared to the previous generation.
50%UnverifiedAnthropic launched Claude Opus 5.5, with capabilities close to the flagship Fable 5.1, costs reduced by 40%, and output speed improved by more than 30% compared to Opus 5.
50%