Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
Released · 6 days after Claude Opus 5.5
Key info
Context window
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Max output
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Input price
$2.00 /1M
Output price
$10.00 /1M
Prices are the median across providers tracked by Artificial Analysis, not Opper billing.
Benchmarks
Independent benchmark scores — composite indices for reasoning, coding, and math, plus individual eval scores where available.
Global rank#2 of 670 LLMs
TierFrontier
Intelligence Index56.0
Reasoning & knowledge
Humanity's Last Exam
55%
Long-context reasoning
83%
Coding
SciCode
61%
See full leaderboard →Benchmarks via Artificial Analysis · View on AA
Available routes
No routes currently available — Claude Sonnet 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) isn't routed through the Opper gateway right now. It's tracked here for its release history.
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