gpt-oss-120b vs Kimi K2.5
Head to head on 19 shared benchmarks, with price, context window, and release dates.
Benchmark scores
49evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kimi K2.5 Moonshot AI | 68.3% | 35.0% | 1579elo | 74.9 | 87.9% | 30.7% | 70.2% | 72.5% | 77.9% | 61.4% | 57.4% | 77.7% | 84.9% | 76.0% | 49.0% | 70.8% | 74.2% | 34.8% | 95.9% | - | - | 96.1 | - | - | 35.8% | 27.9% | - | 95.4 | 78.5% | 10421 | - | - | - | 62.0% | 39.3% | 76.4% | - | 87.1 | - | 66.5% | 63.3% | 49.9% | - | 73 | 67.3% | - | 69.4 | 26.3% | 17.5% | 59.8% |
| gpt-oss-120b OpenAI | 58.2% | 11.0% | 961elo | 35.8 | 78.2% | 19.6% | 69.0% | 51.0% | 60.2% | 38.8% | 50.3% | 48.6% | 68.9% | 39.2% | 34.0% | 26.0% | 71.6% | 23.5% | 65.8% | 41.8% | 93.4% | - | 38.9% | 7.6% | - | - | 57.6 | - | - | - | 87.8% | 1.62 | 1.53 | - | - | - | 80.0% | - | 80.8% | - | - | - | 97.9% | - | - | 65.6% | - | - | - | 54.1% |
2 / 2 models
| Attribute | gpt-oss-120b OpenAI | Kimi K2.5 Moonshot AI |
|---|---|---|
| Description | GPT-Oss 120b is an AI model from OpenAI, released with open weights. | Kimi K2.5 is an AI model from Kimi. |
| Family | GPT | Kimi |
| Params | - | - |
| Open weights | open | open |
| License | apache-2.0 | Modified MIT |
| Released | 5 Aug 2025 | 27 Jan 2026 |
| Context | 131,072 | 262,144 |
| Input $/1M | $0.15 | $0.60 |
| Output $/1M | $0.59 | $2.75 |
| Cache read $/1M | $0.075 | $0.150 |
| Cache write $/1M | - | - |
| Speed | 224 tok/s | 0 tok/s |
| Latency | 0.51 s | 0.00 s |
| Modalities | text | text, image |
| Providers | - | - |
| Publisher | OpenAI | Moonshot AI |
| Reported scores | GPQA Diamond78.2% (AA) Humanity's Last Exam (HLE)19.6% (AA) LiveCodeBench87.8% (AA) MMLU-Pro80.8% (AA) SciCode34.0% (AA) | GPQA Diamond87.9% (AA) Humanity's Last Exam (HLE)30.7% (AA) IFBench70.2% (AA) SciCode49.0% (AA) τ²-bench (Tau²-bench)95.9% (AA) |
FAQ
- Is gpt-oss-120b or Kimi K2.5 better?
- Across the 19 benchmarks both models report on Sophon, Kimi K2.5 leads on 19 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do gpt-oss-120b and Kimi K2.5 compare on GPQA Diamond?
- gpt-oss-120b scores 78.2% and Kimi K2.5 scores 87.9% on GPQA Diamond.
- Which is cheaper, gpt-oss-120b or Kimi K2.5?
- gpt-oss-120b is cheaper at $0.59 per million output tokens against $2.75 for Kimi K2.5 - about 4.7x.
- When were gpt-oss-120b and Kimi K2.5 released?
- gpt-oss-120b was released 5 Aug 2025 by OpenAI. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.
Other head-to-heads
56Claude Opus 4.6 vs Kimi K2.531 shared evalsGemini 3.1 Pro Preview vs Kimi K2.530 shared evalsGPT-5.2 vs Kimi K2.529 shared evalsKimi K2.5 vs Qwen3.6 Plus29 shared evalsClaude Sonnet 4.5 vs Kimi K2.528 shared evalsGPT-5.5 vs Kimi K2.528 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsGPT-5.4 vs Kimi K2.528 shared evalsClaude Opus 4.7 vs Kimi K2.528 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsGLM 5.1 vs Kimi K2.526 shared evalsGPT-5 Mini vs Kimi K2.525 shared evalsGPT-5 Mini vs gpt-oss-120b25 shared evalsDeepSeek V3.2 vs Kimi K2.525 shared evalsGPT-5.4 Mini vs Kimi K2.525 shared evalsGrok 4.1 Fast vs Kimi K2.524 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsDeepSeek V3.2 vs gpt-oss-120b23 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsGPT-5 Nano vs gpt-oss-120b22 shared evalsGPT-5.2 vs gpt-oss-120b22 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsClaude 4 Sonnet vs gpt-oss-120b21 shared evalsGemini 2.5 Pro vs Kimi K2.521 shared evalsGLM 4.7 vs Kimi K2.520 shared evalsgpt-oss-120b vs Grok 4.1 Fast20 shared evalsGLM 4.7 vs gpt-oss-120b20 shared evalsGPT-5.5 vs gpt-oss-120b19 shared evalsClaude Opus 4.6 vs gpt-oss-120b19 shared evalsGLM 5.1 vs gpt-oss-120b19 shared evalsGemini 2.5 Pro vs gpt-oss-120b19 shared evalsGPT-5 vs Kimi K2.518 shared evalsGemini 3.1 Pro Preview vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsGPT-5.4 vs gpt-oss-120b18 shared evalsClaude Opus 4.7 vs gpt-oss-120b18 shared evalsClaude Sonnet 4.6 vs gpt-oss-120b18 shared evalsGPT-5 vs gpt-oss-120b17 shared evalsGPT-4o vs gpt-oss-120b17 shared evalsGPT-5.4 Mini vs gpt-oss-120b17 shared evalsGPT-4.1 vs gpt-oss-120b16 shared evalsgpt-oss-120b vs Qwen3.6 Plus16 shared evalsGPT-4.1 Mini vs gpt-oss-120b15 shared evalsGPT-4o vs Kimi K2.515 shared evalsGPT-4o-mini vs gpt-oss-120b15 shared evalsGPT-4.1 Nano vs gpt-oss-120b14 shared evalsGPT-6 Astra vs Kimi K2.513 shared evalsGPT-4.1 Mini vs Kimi K2.512 shared evalsGPT-4.1 vs Kimi K2.512 shared evalsGPT-4o-mini vs Kimi K2.512 shared evalsGPT-4.1 Nano vs Kimi K2.512 shared evalsGPT-6 Astra vs gpt-oss-120b6 shared evals
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