gpt-oss-120b vs Kimi K3.1 Pro
Price, context window & benchmark comparison
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Verdict: gpt-oss-120b is 15.2× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix. Kimi K3.1 Pro scores higher on the Artificial Analysis Intelligence Index (46.5 vs 3.8). Kimi K3.1 Pro has the larger context window (1M vs 131K).
| gpt-oss-120b | Kimi K3.1 Pro | |
|---|---|---|
| Input price / 1M | $0.15 | $2.00 |
| Output price / 1M | $0.60 | $10.00 |
| Blended price (3:1) | $0.26 | $4.00 |
| Cached input / 1M | $0.075 | $0.20 |
| Context window | 131K | 1M |
| Max output | 66K | 944K |
| Intelligence index | 3.8 | 46.5 |
| Coding index | 30.4 | — |
| Providers | — | 23 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | No | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2025-08-05 | 2026-10-23 |
| Retirement | — | — |
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FAQ
Which is cheaper, gpt-oss-120b or Kimi K3.1 Pro?
gpt-oss-120b is 15.2× cheaper than Kimi K3.1 Pro on a typical 3:1 input/output mix.
gpt-oss-120b vs Kimi K3.1 Pro: which has a bigger context window?
gpt-oss-120b: 131,072 tokens. Kimi K3.1 Pro: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: gpt-oss-120b ≈ $600.00, Kimi K3.1 Pro ≈ $9,000.
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