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Anthropic

Claude 4.1 Opus Thinking

Claude 4.1 Opus Thinking is a reasoning model from Anthropic in the Claude 4.1 Opus family. 8 benchmarks count toward its index, in 5 categories.

  • Closed weights
  • Reasoning
  • Input: text
  • Released 2025-08
RankedEnough results for an index.
IndexAll categories, out of 100.47.0±9.2Median 51.0
CoverageIndex weight that has results.65%
SpeedOutput tokens per second.29/sMedian 67/s
First tokenSeconds to the first output token.15.0 sMedian 1.3 s
Input / 1MUS dollars per 1M input tokens.—Median $0.60
Output / 1MUS dollars per 1M output tokens.—Median $2.55
ContextMaximum tokens in one request.200KMedian 262K
EloLMArena rating and rank.—Median 1422

Capabilities

Index per category, out of 100.
Out of 100
AgenticMulti-step tasks with tools.1 counted50.2—
CodingCode writing and repair.None counted——
ReasoningLogic problems and puzzles.2 counted48.1131 / 227
MultimodalTasks with images and text.1 counted43.5—
KnowledgeFacts and expert knowledge.3 counted47.9153 / 268
MultilingualTasks in many languages.None counted——
InstructionTasks with strict prompt rules.1 counted40.8—
MathMath problems.None counted——

Results

8 counted
BenchmarkThe benchmark name.ResultThe score from the source.PlacePlace among results on this benchmark.
Artificial Analysis MMLU-ProKnowledge88.0%3 / 15
Artificial Analysis Long Context ReasoningReasoning76.0%88 / 217
Artificial Analysis IFBenchInstruction55.4%71 / 146
Artificial Analysis GPQA DiamondKnowledge80.9%97 / 199
τ²-Bench Tool-Agent-User EvaluationAgentic71.4%80 / 149
Artificial Analysis Humanity's Last ExamKnowledge12.5%133 / 222
Critical Physics TasksReasoning0.0%150 / 214
Artificial Analysis MMMU-ProMultimodal67.9%80 / 113

Sources

BenchLMCC BY-NC 4.0

History

5 releases
Index47.4 → 47.0
29 Oct 202612 Nov 2026

Questions

How good is Claude 4.1 Opus Thinking?
Its index is 47.0 out of 100. That is place 168 of 283 ranked models.
What is Claude 4.1 Opus Thinking best at?
Knowledge: 47.9 out of 100, place 153 of 268.
How fast is Claude 4.1 Opus Thinking?
29 output tokens per second, 15.0 s to the first token.
What is the context window of Claude 4.1 Opus Thinking?
200K tokens.
Is Claude 4.1 Opus Thinking open source?
No. Its weights are not published.
When was Claude 4.1 Opus Thinking released?
August 2025.

Badge

Claude 4.1 Opus Thinking on Inference360: place 168 of 283, index 47.0
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Compare with

Claude 4 Opus Thinking47.0MiMo-V2-Omni47.2

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