gpt-oss-20b vs Kimi K2 Thinking
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
OpenAI · Aug 2025
The small gpt-oss variant that runs on a 16GB consumer GPU or laptop — local reasoning for everyone, Apache 2.0 licensed.
Moonshot AI · Nov 2025
A trillion-parameter open reasoning agent that can chain 200–300 tool calls — the open-weights agentic standout of late 2025.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: gpt-oss-20b works out roughly 12x cheaper per blended million tokens. Kimi K2 Thinking also takes 262K of context versus 131K for gpt-oss-20b.
Specs & pricing
| gpt-oss-20b | Kimi K2 Thinking | |
|---|---|---|
| modhub Index | — | 67.6 |
| Input price / 1M | $0.05 | $0.6 |
| Output price / 1M | $0.2 | $2.5 |
| Context window | 131K | 262K |
| Max output | 131K | — |
| Open weights | yes (Apache 2.0) | yes (Modified MIT) |
| Reasoning model | yes | yes |
| Multimodal input | text | text |
| Knowledge cutoff | Jun 2024 | Apr 2025 |
| Released | Aug 2025 | Nov 2025 |
| Example monthly cost* | $0.8 | $9.75 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, gpt-oss-20b or Kimi K2 Thinking?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. On price the gap is dramatic: gpt-oss-20b works out roughly 12x cheaper per blended million tokens. Kimi K2 Thinking also takes 262K of context versus 131K for gpt-oss-20b.
- Which is cheaper, gpt-oss-20b or Kimi K2 Thinking?
- gpt-oss-20b costs $0.05/$0.2 per million input/output tokens, while Kimi K2 Thinking costs $0.6/$2.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $0.8 versus $9.75.
- Which model is better for coding, gpt-oss-20b or Kimi K2 Thinking?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.