Model comparison
Kimi K2 (Jul 2025) vs Molmo 2 8b
Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 38.7 on the Noometry Index.
Last verified . 4 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 4 benchmarks with published results for both. Kimi K2 (Jul 2025) scores higher in 3 categories and Molmo 2 8b in 1 category; 4 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2 (Jul 2025) leads 62.5 to 49.5.
Side by side
| Kimi K2 (Jul 2025) | Molmo 2 8b | |
|---|---|---|
| Provider | Moonshot AI | Allen Institute for AI (Ai2) |
| Noometry Index | 40.9 | 38.7 |
| Released | 2025-07-12 | — |
| Weights | Open | Open |
| Context window | 262K | — |
| Max output | 262K | — |
| Input $ / M tokens | $0.57 | — |
| Output $ / M tokens | $2.30 | — |
| Results tracked | 42 | 5 |
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Category by category
Coding Not comparable
Kimi K2 (Jul 2025): 43.1 (#83), Molmo 2 8b: —
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| SWE-bench Verified (bash only) | 63.4% | — |
| Aider Polyglot | 59.1% | — |
| GSO | 4.9% | — |
| WeirdML | 42.8% | — |
| LMArena Coding | 1399 | — |
| ALE-Bench | 597.5 | — |
Agentic & Tool Use Not comparable
Kimi K2 (Jul 2025): 32.2 (#59), Molmo 2 8b: —
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| Terminal-Bench | 35.7% | — |
| Berkeley Function Calling Leaderboard | 59.1% | — |
| METR Time Horizons | 59.2% | — |
Reasoning Molmo 2 8b leads
Kimi K2 (Jul 2025): 22.7 (#173), Molmo 2 8b: 24.5 (#146)
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| LMArena Hard Prompts | 1384 | 1288 |
| SimpleBench | 26.3% | — |
| Kagi LLM Benchmark | 64.4% | — |
| Epoch Capabilities Index | 146.02 | — |
| ForecastBench | 60.2 | — |
Math Not comparable
Kimi K2 (Jul 2025): 40.1 (#81), Molmo 2 8b: —
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| Omni-MATH | 65.4% | — |
| LMArena Math | 1396 | — |
| FrontierMath (Feb 2025 set) | 21.4% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Not comparable
Kimi K2 (Jul 2025): 36.9 (#153), Molmo 2 8b: —
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| MMLU-Pro | 81.9% | — |
| Confabulations | 20.4% | — |
| Vectara Hallucination Rate | 17.9% | — |
| GPQA (HELM) | 65.3% | — |
| LMArena Expert | 1363 | — |
Multimodal Not comparable
Kimi K2 (Jul 2025): —, Molmo 2 8b: 29.5 (#106)
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| LMArena Vision | — | 1081 |
Multilingual Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 49.8 (#125), Molmo 2 8b: 42.8 (#186)
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| LMArena Non-English | 1372 | 1275 |
| LMArena Chinese | 1416 | — |
| LMArena French | 1379 | — |
| LMArena German | 1386 | — |
| LMArena Japanese | 1349 | — |
| LMArena Korean | 1324 | — |
| LMArena Russian | 1384 | — |
| LMArena Spanish | 1383 | — |
Instruction Following Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 71.3 (#151), Molmo 2 8b: 67.2 (#196)
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| LMArena Instruction Following | 1347 | 1270 |
| IFEval | 85% | — |
Long Context Not comparable
Kimi K2 (Jul 2025): 41.2 (#140), Molmo 2 8b: —
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| Fiction.LiveBench | 66.7% | — |
| CL-bench | 17.6% | — |
| LMArena Longer Query | 1353 | — |
Writing & Preference Kimi K2 (Jul 2025) leads
Kimi K2 (Jul 2025): 62.5 (#76), Molmo 2 8b: 49.5 (#187)
| Benchmark | Kimi K2 (Jul 2025) | Molmo 2 8b |
|---|---|---|
| LMArena Text | 1380 | 1288 |
| 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 Kimi K2 (Jul 2025) better than Molmo 2 8b?
Kimi K2 (Jul 2025) is the stronger model overall, scoring 40.9 to 38.7 on the Noometry Index.
How many benchmarks do Kimi K2 (Jul 2025) and Molmo 2 8b share?
4 benchmarks have published results for both models. Kimi K2 (Jul 2025) has 42 scored results on Noometry and Molmo 2 8b has 5.