DeepSeek V4 vs gpt-oss-20b
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
DeepSeek V4
DeepSeek · Mar 2026
The open-weights shock of 2026: ~81% SWE-bench Verified, a 1M context and MIT license at $0.30/$0.50 per million tokens.
gpt-oss-20b
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.
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 4.0x cheaper per blended million tokens. DeepSeek V4 also takes 1M of context versus 131K for gpt-oss-20b.
Specs & pricing
| DeepSeek V4 | gpt-oss-20b | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $0.3 | $0.05 |
| Output price / 1M | $0.5 | $0.2 |
| Context window | 1M | 131K |
| Max output | 64K | 131K |
| Open weights | yes (MIT) | yes (Apache 2.0) |
| Reasoning model | yes | yes |
| Multimodal input | text | text |
| Knowledge cutoff | Dec 2025 | Jun 2024 |
| Released | Mar 2026 | Aug 2025 |
| Example monthly cost* | $3.75 | $0.8 |
* 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, DeepSeek V4 or gpt-oss-20b?
- 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 4.0x cheaper per blended million tokens. DeepSeek V4 also takes 1M of context versus 131K for gpt-oss-20b.
- Which is cheaper, DeepSeek V4 or gpt-oss-20b?
- DeepSeek V4 costs $0.3/$0.5 per million input/output tokens, while gpt-oss-20b costs $0.05/$0.2. For a typical workload of 10M input and 1.5M output tokens per month, that's $3.75 versus $0.8.
- Which model is better for coding, DeepSeek V4 or gpt-oss-20b?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.