OpenAI: gpt-oss-20b
The OpenAI gpt-oss-20b model is designed for text input and processing. It supports reasoning capabilities and has access to various tools, but it does not provide structured output. The model's context length is set at 131072 tokens, with a maximum of 117964 completion tokens. Considering its price point, the OpenAI gpt-oss-20b may be suitable for organizations willing to pay $0.03 per million input tokens and $0.13 per million output tokens. Its benchmark performance is a blended score of 24.8 across two independent benchmarks, which may indicate competitiveness in certain applications; however, further evaluation would be necessary to confirm its effectiveness in specific use cases.
Benchmark results
Independent, published benchmarks. Blended score 24.3 across 2 benchmarks, last refreshed 2026-10-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 14.8 |
| EQ-Bench | emotional understanding in dialogue | 40.7 |
- Model ID
- openai/gpt-oss-20b
- Vendor
- openai
- Released
- August 2025
- Tokenizer
- GPT
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 32,768 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- text only
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.02/M input and $0.09/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.01 |
| A month of a busy support chatbot | 5M in / 2M out | $0.27 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-09-23 | $0.02 | $0.09 | 131,072 |
| 2026-08-02 | $0.03 | $0.13 | 131,072 |
| 2026-08-01 | $0.03 | $0.14 | 131,072 |
| 2026-07-30 | $0.03 | $0.13 | 131,072 |
| 2026-07-26 | $0.03 | $0.14 | 131,072 |
| 2026-07-25 | $0.03 | $0.13 | 131,072 |
| 2026-07-24 | $0.03 | $0.14 | 131,072 |
| 2026-07-17 | $0.03 | $0.13 | 131,072 |
Similar models
OpenAI: gpt-oss-120b (batch)
OpenAI: gpt-oss-20b (batch)
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OpenAI: gpt-oss-120b
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OpenAI: GPT-5 Image
Quick answers
- How much does OpenAI: gpt-oss-20b cost?
- $0.02 per million input tokens and $0.09 per million output tokens.
- What is OpenAI: gpt-oss-20b's context window?
- 131,072 tokens, roughly 196 pages of text in a single request.
- Does OpenAI: gpt-oss-20b support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can OpenAI: gpt-oss-20b process images?
- No, it is text-only on the input side.