gpt-oss-120b by fireworksai - AI Model Details, Pricing, and Performance Metrics
gpt-oss-120b
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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 to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.
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 to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.
| Provider | Input | Output | 
|---|---|---|
| $0.15 / 1M tokens | $0.6 / 1M tokens | |
| $0.09 / 1M tokens | $0.45 / 1M tokens | |
| $0.15 / 1M tokens | $0.75 / 1M tokens | |
| $0.15 / 1M tokens | $0.6 / 1M tokens | 
| Providers | Context | Input Price | Output Price | Input Formats | Output Formats | License | 
|---|---|---|---|---|---|---|
| 131072 tokens | $0.15 / 1M tokens | $0.6 / 1M tokens | text  | text  | Apache-2.0  | |
| 131072 tokens | $0.09 / 1M tokens | $0.45 / 1M tokens | text  | text  | Apache-2.0  | |
| 131072 tokens | $0.15 / 1M tokens | $0.75 / 1M tokens | text  | text  | Apache-2.0  | |
| 131072 tokens | $0.15 / 1M tokens | $0.6 / 1M tokens | text  | text  | Apache-2.0  | 
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Statistics
Category Scores
Benchmark Tests
| Metric | AA Coding Index  | AAII  | AA Math Index  | GPQA  | HLE  | LiveCodeBench  | MMLU-Pro  | SciCode  | 
|---|---|---|---|---|---|---|---|---|
| Score | 41.2  | 58.0  | 93.4  | 79.2  | 18.5  | 65.3  | 80.8  | 36.2  | 
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