OpenAI: gpt-oss-20b
The OpenAI gpt-oss-20b is a powerful text-focused AI model with a context length of 131,072 tokens and supports reasoning and tools integration. It can process large volumes of input while maintaining the ability to generate detailed and coherent responses, making it suitable for complex tasks that require both depth and breadth of understanding. This model should be considered by those seeking a robust text-based solution, especially when combined with external tools for enhanced functionality. With its blended benchmark score of 25.7 across four independent evaluations, it stands as a reliable choice; however, the pricing at $0.03 per million input tokens and $0.13 per million output tokens might be a factor to weigh against its performance in less frequently used applications.
Benchmark results
Independent, published benchmarks. Blended score 25.7 across 4 benchmarks, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 25.1 |
| AI Index Coding | software engineering tasks | 34.1 |
| AI Index Agentic | multi-step tool-using tasks | 5.1 |
| 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
- 131,072 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 $0.03/M input and $0.13/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 | $0.02 |
| A month of a busy support chatbot | 5M in / 2M out | $0.41 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 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 |
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OpenAI: GPT-5.5
Quick answers
- How much does OpenAI: gpt-oss-20b cost?
- $0.03 per million input tokens and $0.13 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.