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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...

textAPI availablestreamingreasoningfunction tools
gpt-oss-120b

Tokely price / 1M tokens

$1.65input
$1.65cached input
$6.6output

USD · Published rate · Updated 2026-10-06

OpenRouter reference$0.037 input · $0.17 output / 1M tokensStandard listed rates · 2026-10-06

Context window

131,072tokens · model specification

Model max output

117,964tokens

First request

Available
curl https://tokely.me/v1/chat/completions \
  -H "Authorization: Bearer $TOKELY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-oss-120b",
    "messages": [{"role": "user", "content": "Hello!"}],
    "max_tokens": 256
  }'

Set TOKELY_API_KEY to your dashboard key. Requests require a funded Tokely balance. Base URL: https://tokely.me/v1.

Compare nearby prices

USD per million tokens. Compare price and context; these are not quality benchmarks.
ModelInputOutputContext
gpt-oss-120bOpenAI · this model$1.65$6.6131,072
MiniMax-M3MiniMax$1.65$6.61,048,576
glm-4.5ChatGLM$1.65$6.6131,072
glm-4.6ChatGLM$1.65$6.6204,800
kimi-k2-0711-previewMoonshot$1.65$6.6Unconfirmed

Capabilities & limits

Provider
OpenAI
API model ID
gpt-oss-120b
Category
Text
Endpoints
POST /v1/chat/completions
Tokely max output
65,536 tokens / request, including reasoning tokens
Default output
256 tokens. Set an explicit limit for longer responses.
Request limits
256 KB JSON body · 128 messages · 32 function tools
Rate limit
60 requests / minute / account, across its keys
Supported input
Text messages and function tool results
Model modalities
text. Tokely currently accepts text input.

The context includes your instructions, conversation history, tool definitions and generated output. Keep the input and requested output within the model’s context window.

OpenRouter model reference

API reference

Authenticate with Authorization: Bearer YOUR_TOKELY_API_KEY. Use an OpenAI SDK with the Tokely base URL.

model
Required string: gpt-oss-120b
messages
An array of system, developer, user, assistant and tool messages.
max_tokens
Optional integer, 1–65,536. Defaults to 256.
stream
Set true for Server-Sent Events (SSE).
reasoning_effort
Optional reasoning effort. Supported values depend on the model; omit to use its default.
tools
Function definitions executed by your application. Provider-hosted tools are not enabled.

The response contains choices with message or tool_calls, finish_reason, and usage (prompt_tokens, completion_tokens, total_tokens). Streaming sends chat completion chunks.

400 / 415
Invalid request, parameter, endpoint for this model, or content type.
401 / 403
Invalid, revoked or restricted API key.
402
Insufficient account balance or API key budget.
429
Request limit reached. Retry after the indicated delay.
502 / 503 / 504
Upstream failure, temporary service unavailability or request timeout.

Frequently asked questions

How much does gpt-oss-120b cost?

$1.65 per million input tokens, $6.6 per million output tokens and $1.65 per million cached input tokens. Usage is charged to your Tokely balance.

Do I need a separate OpenAI account?

Use your Tokely API key and balance. A separate provider key is not required.

How do I switch to this model?

Set model to gpt-oss-120b and use /v1/chat/completions. Keep your Tokely base URL and API key.

What is the context window?

131,072 tokens, including input and output. The Tokely request body and output limits listed above also apply.