OpenAI GPT 120B
Summary
OpenAI GPT 120B is an open-weight language model from OpenAI, released on 5 Aug 2025. It accepts text and generates text, with a 128K-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.04 per million input tokens and $0.17 per million output tokens (DeepInfra), across 15 providers we track.
Open-weight GPT model for self-hosted reasoning and instruction-following workloads
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 5 Aug 2025 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [Hugging Face] |
| License | apache-2.0 [Hugging Face] |
| Parameters | 117B [Hugging Face] |
| Context window | 128K (128,072 tokens) [models.dev] |
| Max output | 128K tokens [models.dev] |
| Knowledge cutoff | Aug 2025 [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
| Hugging Face | openai/gpt-oss-120b [Hugging Face] |
OpenAI GPT 120B API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| DeepInfra openai/gpt-oss-120b | $0.04 | $0.17 | – | 131K | models.dev, 4 Oct 2026 |
| OpenRouter openai/gpt-oss-120b | $0.04 | $0.17 | – | 131K | OpenRouter, 4 Oct 2026 |
| SiliconFlow openai/gpt-oss-120b | $0.05 | $0.45 | – | 131K | models.dev, 4 Oct 2026 |
| Novita AI openai/gpt-oss-120b | $0.05 | $0.25 | – | 131K | models.dev, 4 Oct 2026 |
| Google Vertex AI openai/gpt-oss-120b-maas | $0.09 | $0.36 | – | 131K | models.dev, 4 Oct 2026 |
| Baseten openai/gpt-oss-120b | $0.10 | $0.50 | – | 128K | models.dev, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-oss-120b | $0.10 | $0.50 | $0.10 | 131K | models.dev, 4 Oct 2026 |
| Amazon Bedrock openai.gpt-oss-120b | $0.15 | $0.60 | – | 131K | models.dev, 4 Oct 2026 |
| Amazon Bedrock openai.gpt-oss-120b-1:0 | $0.15 | $0.60 | – | 131K | models.dev, 4 Oct 2026 |
| Groq openai/gpt-oss-120b | $0.15 | $0.60 | $0.07 | 131K | models.dev, 4 Oct 2026 |
| Nebius AI Studio openai/gpt-oss-120b | $0.15 | $0.60 | $0.01 | 131K | models.dev, 4 Oct 2026 |
| Fireworks AI accounts/fireworks/models/gpt-oss-120b | $0.15 | $0.60 | $0.01 | 131K | models.dev, 4 Oct 2026 |
| Together AI openai/gpt-oss-120b | $0.15 | $0.60 | – | 131K | models.dev, 4 Oct 2026 |
| Amazon Bedrock us-gov.openai.gpt-oss-120b-1:0 | $0.18 | $0.72 | – | 128K | models.dev, 4 Oct 2026 |
| Hugging Face Inference Providers openai/gpt-oss-120b | $0.25 | $0.69 | – | 131K | models.dev, 4 Oct 2026 |
| Cloudflare Workers AI @cf/openai/gpt-oss-120b | $0.35 | $0.75 | – | 128K | models.dev, 4 Oct 2026 |
| Cerebras gpt-oss-120b | $0.35 | $0.75 | – | 131K | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of OpenAI GPT 120B?
OpenAI GPT 120B has a context window of 128,072 tokens (128K) and can generate up to 128,072 tokens in a single response, according to models.dev.
How much does the OpenAI GPT 120B API cost?
OpenAI GPT 120B is listed from $0.04 per million input tokens and $0.17 per million output tokens (DeepInfra). Prices last verified 4 Oct 2026.
Is OpenAI GPT 120B open source?
OpenAI GPT 120B is an open-weight model: its weights are published on Hugging Face as openai/gpt-oss-120b under the apache-2.0 license. Check the license terms before commercial use.
When was OpenAI GPT 120B released?
OpenAI released OpenAI GPT 120B on 5 Aug 2025, according to models.dev.
Which providers offer OpenAI GPT 120B?
We track OpenAI GPT 120B on 15 providers: DeepInfra, OpenRouter, SiliconFlow, Novita AI, Google Vertex AI, Baseten, Vercel AI Gateway, Amazon Bedrock, Groq, Nebius AI Studio, Fireworks AI, Together AI, Hugging Face Inference Providers, Cloudflare Workers AI, Cerebras.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://openrouter.ai/openai/gpt-oss-120b
- https://github.com/sst/models.dev/blob/dev/providers/baseten/models/openai/gpt-oss-120b.toml
- https://huggingface.co/openai/gpt-oss-120b
- https://github.com/sst/models.dev/blob/dev/providers/deepinfra/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/siliconflow/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/novita-ai/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/google-vertex/models/openai/gpt-oss-120b-maas.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/openai.gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/openai.gpt-oss-120b-1:0.toml
- https://github.com/sst/models.dev/blob/dev/providers/groq/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/nebius/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/fireworks-ai/models/accounts/fireworks/models/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/togetherai/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/us-gov.openai.gpt-oss-120b-1:0.toml
- https://github.com/sst/models.dev/blob/dev/providers/huggingface/models/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/cloudflare-workers-ai/models/@cf/openai/gpt-oss-120b.toml
- https://github.com/sst/models.dev/blob/dev/providers/cerebras/models/gpt-oss-120b.toml