Model comparison
Claude 4.1 Opus Thinking vs Composer 2 Fast
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 4.1 Opus Thinking #193 (Supported); Composer 2 Fast unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 4.1 Opus Thinking and Composer 2 Fast share 0 comparable benchmark results. 0 of 8 categories are comparable. 9 results are unique to Claude 4.1 Opus Thinking; 1 to Composer 2 Fast.
Updated July 28, 2026- Shared results
- 0
- Claude 4.1 Opus Thinking only
- 9
- Composer 2 Fast only
- 1
- Comparable categories
- 0 / 8
Benchmark data for Claude 4.1 Opus Thinking and Composer 2 Fast is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 4.1 Opus Thinking | Composer 2 Fast | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 4.1 Opus ThinkingNot available | Composer 2 FastNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Claude 4.1 Opus Thinking29 tok/s | Composer 2 FastNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude 4.1 Opus Thinking15.00 s | Composer 2 FastNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude 4.1 Opus Thinking200K | Composer 2 Fast200K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Composer 2 Fast | Result |
|---|---|---|---|
| τ²-bench resultsSource | 71.4% | — | Not comparable |
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge3 benchmarks
Multimodal1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Composer 2 Fast | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 67.9% | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Composer 2 Fast | Result |
|---|---|---|---|
| AA-IFBenchSource | 55.4% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Claude 4.1 Opus Thinking and Composer 2 Fast on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude 4.1 Opus Thinking and Composer 2 Fast today?
Claude 4.1 Opus Thinking: Pricing unavailable Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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Know when it’s worth switching models
The model to choose, the cheaper alternative, and the release we would wait on.
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