Model comparison
Chatgpt 4o Latest 20250326 vs Kimi K2 (Jul 2025)
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 41.2 on the Noometry Index.
Last verified . 20 shared benchmarks.
Summary
- They share 20 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 6 categories and Kimi K2 (Jul 2025) in 2 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Chatgpt 4o Latest 20250326 leads 33.8 to 23.3.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 64.4% for Kimi K2 (Jul 2025).
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) | |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Noometry Index | 43.8 | 41.2 |
| Released | — | 2025-07-12 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.57 |
| Output $ / M tokens | — | $2.30 |
| Results tracked | 21 | 42 |
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Category by category
Coding Too close to call
Chatgpt 4o Latest 20250326: 41.6 (#122), Kimi K2 (Jul 2025): 42.4 (#102)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Coding | 1413 | 1399 |
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| GSO | — | 4.9% |
| WeirdML | — | 42.8% |
| ALE-Bench | — | 597.5 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, Kimi K2 (Jul 2025): 32.4 (#64)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| METR Time Horizons | — | 59.2% |
Reasoning Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), Kimi K2 (Jul 2025): 23.3 (#179)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| Kagi LLM Benchmark | 75% | 64.4% |
| LMArena Hard Prompts | 1424 | 1384 |
| SimpleBench | — | 26.3% |
| Epoch Capabilities Index | — | 146.01 |
| ForecastBench | — | 60.2 |
Math Kimi K2 (Jul 2025) leads
Chatgpt 4o Latest 20250326: 38.6 (#134), Kimi K2 (Jul 2025): 42.7 (#83)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Math | 1407 | 1397 |
| Omni-MATH | — | 65.4% |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 39.2 (#137), Kimi K2 (Jul 2025): 37.3 (#157)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| Confabulations | 16.6% | 20.4% |
| LMArena Expert | 1401 | 1365 |
| MMLU-Pro | — | 81.9% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |
Multimodal Not comparable
Chatgpt 4o Latest 20250326: 39.6 (#58), Kimi K2 (Jul 2025): —
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Vision | 1243 | — |
Multilingual Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 52.9 (#76), Kimi K2 (Jul 2025): 49.6 (#130)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1419 | 1372 |
| LMArena Chinese | 1457 | 1415 |
| LMArena French | 1446 | 1379 |
| LMArena German | 1423 | 1387 |
| LMArena Japanese | 1405 | 1349 |
| LMArena Korean | 1396 | 1325 |
| LMArena Russian | 1429 | 1385 |
| LMArena Spanish | 1434 | 1386 |
Instruction Following Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 74.0 (#107), Kimi K2 (Jul 2025): 71.1 (#156)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Instruction Following | 1403 | 1348 |
| IFEval | — | 85% |
Long Context Chatgpt 4o Latest 20250326 leads
Chatgpt 4o Latest 20250326: 43.1 (#107), Kimi K2 (Jul 2025): 41.2 (#145)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1413 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |
Writing & Preference Too close to call
Chatgpt 4o Latest 20250326: 62.6 (#72), Kimi K2 (Jul 2025): 62.3 (#78)
| Benchmark | Chatgpt 4o Latest 20250326 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1429 | 1380 |
| LMArena Creative Writing | 1405 | 1350 |
| EQ-Bench Creative Writing | 1501 | 1666 |
| LMArena Multi-Turn | 1454 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| WildBench | — | 86.2% |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than Kimi K2 (Jul 2025)?
Chatgpt 4o Latest 20250326 is the stronger model overall, scoring 43.8 to 41.2 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or Kimi K2 (Jul 2025) better for coding?
They score almost the same on coding (41.6 vs 42.4); test both on your own repository before choosing.
How many benchmarks do Chatgpt 4o Latest 20250326 and Kimi K2 (Jul 2025) share?
20 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Kimi K2 (Jul 2025) has 42.