Model comparison
Claude Instant vs Kimi K2 (Jul 2025)
Kimi K2 (Jul 2025) has enough public results to be ranked (#134); Claude Instant does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Claude Instant scores higher in 0 categories and Kimi K2 (Jul 2025) in 1 category; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where Kimi K2 (Jul 2025) leads 22.7 to 18.8.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Claude Instant | Kimi K2 (Jul 2025) | |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Noometry Index | 28.8 | 40.9 |
| Released | 2023-08-09 | 2025-07-12 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.57 |
| Output $ / M tokens | — | $2.30 |
| Results tracked | 7 | 42 |
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Category by category
Coding Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 43.1 (#83)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| GSO | — | 4.9% |
| WeirdML | — | 42.8% |
| LMArena Coding | — | 1399 |
| ALE-Bench | — | 597.5 |
| HumanEval+ | 50.6% | — |
Agentic & Tool Use Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 32.2 (#59)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| METR Time Horizons | — | 59.2% |
Reasoning Kimi K2 (Jul 2025) leads
Claude Instant: 18.8, Kimi K2 (Jul 2025): 22.7 (#173)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| Epoch Capabilities Index | 120.2 | 146.02 |
| SimpleBench | — | 26.3% |
| Kagi LLM Benchmark | — | 64.4% |
| LMArena Hard Prompts | — | 1384 |
| DTBench | 45.8% | — |
| ForecastBench | — | 60.2 |
Math Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 40.1 (#81)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| Omni-MATH | — | 65.4% |
| LMArena Math | — | 1396 |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |
| GSM8K | 86.7% | — |
Knowledge Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 36.9 (#153)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| MMLU-Pro | — | 81.9% |
| Confabulations | — | 20.4% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |
| LMArena Expert | — | 1363 |
| ARC (AI2) Challenge | 86.3% | — |
| MMLU | 73.4% | — |
| TriviaQA | 78.9% | — |
Multilingual Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 49.8 (#125)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | — | 1372 |
| LMArena Chinese | — | 1416 |
| LMArena French | — | 1379 |
| LMArena German | — | 1386 |
| LMArena Japanese | — | 1349 |
| LMArena Korean | — | 1324 |
| LMArena Russian | — | 1384 |
| LMArena Spanish | — | 1383 |
Instruction Following Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 71.3 (#151)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| IFEval | — | 85% |
| LMArena Instruction Following | — | 1347 |
Long Context Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 41.2 (#140)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |
| LMArena Longer Query | — | 1353 |
Writing & Preference Not comparable
Claude Instant: —, Kimi K2 (Jul 2025): 62.5 (#76)
| Benchmark | Claude Instant | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | — | 1380 |
| LMArena Creative Writing | — | 1349 |
| Short-Story Creative Writing | — | 85.6% |
| EQ-Bench Creative Writing | — | 1666 |
| WildBench | — | 86.2% |
| LMArena Multi-Turn | — | 1371 |
Frequently asked questions
Is Claude Instant better than Kimi K2 (Jul 2025)?
Kimi K2 (Jul 2025) has enough public results to be ranked (#134); Claude Instant does not yet, so treat this comparison as directional.
How many benchmarks do Claude Instant and Kimi K2 (Jul 2025) share?
1 benchmark has published results for both models. Claude Instant has 7 scored results on Noometry and Kimi K2 (Jul 2025) has 42.