Model comparison
Claude 4.1 Opus Thinking vs Kimi K2
Head-to-head evidence from 8 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 4.1 Opus Thinking #184 (Supported); Kimi K2 #189 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 4.1 Opus Thinking and Kimi K2 share 8 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to Claude 4.1 Opus Thinking; 6 to Kimi K2.
Updated July 20, 2026- Shared results
- 8
- Claude 4.1 Opus Thinking only
- 1
- Kimi K2 only
- 6
- Comparable categories
- 0 / 8
Benchmark data for Claude 4.1 Opus Thinking and Kimi K2 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 8 shared benchmark results across 5 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.
Claude 4.1 Opus Thinking has the larger context window at 200K, compared with 128K for Kimi K2.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude 4.1 Opus Thinking | Δ | Kimi K2 |
|---|---|---|---|
| Math | Claude 4.1 Opus ThinkingNot measured | MarginNo overlap | Kimi K216.1 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 4.1 Opus Thinking | Kimi K2 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 4.1 Opus ThinkingNot available | Kimi K2$0.6 input / $2.5 output | A complete price comparison is not available. |
| Generation speedtokens per second | Claude 4.1 Opus Thinking29 tok/s | Kimi K243 tok/s | Kimi K2 has the higher measured throughput. |
| First-answer latencyseconds to first token | Claude 4.1 Opus Thinking15.00 s | Kimi K21.51 s | Kimi K2 reaches the first token sooner. |
| Context windowmaximum listed tokens | Claude 4.1 Opus Thinking200K | Kimi K2128K | Claude 4.1 Opus Thinking lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Kimi K2 | Result |
|---|---|---|---|
| τ²-bench resultsSource | 71.4% | 61.1% | Claude 4.1 Opus Thinking leads |
Coding1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Kimi K2 | Result |
|---|---|---|---|
| AA-SciCodeSource | 40.9% | 34.5% | Claude 4.1 Opus Thinking leads |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Kimi K2 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 33.7% | 19.4% | Claude 4.1 Opus Thinking leads |
| AA-GPQA DiamondSource | 80.9% | 76.6% | Claude 4.1 Opus Thinking leads |
| AA-HLESource | 11.9% | 7.0% | Claude 4.1 Opus Thinking leads |
| AA-Omniscience IndexSource | — | -27.5% | Not comparable |
| AA-Omniscience AccuracySource | — | 26.8% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 74.2% | Not comparable |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude 4.1 Opus Thinking | Kimi K2 | Result |
|---|---|---|---|
| AA-IFBenchSource | 55.4% | 41.5% | Claude 4.1 Opus Thinking leads |
Frequently Asked Questions (3)
Can I compare Claude 4.1 Opus Thinking and Kimi K2 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 Kimi K2 today?
Claude 4.1 Opus Thinking: Pricing unavailable Kimi K2: $0.60 input / $2.50 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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