Model specification · OpenAI
gpt-oss-120b
openai/gpt-oss-120b
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
SpecificationsReported values
- Context window
- 131K
- Maximum output
- 66K
- Architecture
- text->text
- Tokenizer
- GPT
- Knowledge cutoff
- 2024-06-30
- Moderated
- No
- Input modalities
- text
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $0.150 / M |
| Output | $0.600 / M |
Benchmark indexesReported indexes
- Intelligence
- 3.8
- Coding
- 30.4
- Agentic
- 3.7
- Design Arena Elo
- 950
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.00210 |
| Long analysis | 100K / 4K × 1 | 50% | $0.014 |
| Workday | 20K / 2K × 1,000 | 30% | $3.75 |
More from OpenAIAll OpenAI models
| Model | Context | Input / M | Output / M | Intel. |
|---|---|---|---|---|
| GPT-6 Astra | 1.1M | $10.00 | $50.00 | 56.9 |
| GPT-6.1 Sol | 1.1M | $2.00 | $10.00 | 54.6 |
| GPT-6.1 Terra | 1.1M | $1.00 | $5.00 | 51.3 |
| GPT-6 Sol | 1.1M | $2.00 | $10.00 | 44.2 |
| GPT-5.6 Terra | 1.1M | $2.00 | $12.00 | 32.3 |
| GPT-6 Luna | 1.1M | $0.100 | $0.500 | 27.9 |
| GPT-5.6 Luna | 1.1M | $0.200 | $1.20 | 23.8 |