Login
OpenAIReasoningReasoningActive

OpenAI: gpt-oss-20b

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

Text
Start with this modelBrowse all models
Specification
Model ID
openai/gpt-oss-20b
Weight license
Not verified; consult the exact publisher model card
Modality
Text >text
Context
131.1K tokens
Input
$0.030/1M
Output
$0.130/1M
Updated
Nov 14, 2026
Scores
Capabilities
  • Supports tool calling
  • No vision support listed
  • Supports long-context workflows
  • Supports deeper reasoning tasks

Input and output

Accepts Text inputs. Returns Text outputs.

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Related models

Baidu

Baidu: ERNIE-5.5-Flash-Preview (free)

ERNIE 5.5 Flash Preview is the latest foundation model in the ERNIE family, with comprehensive improvements in coding, agentic capabilities, knowledge work, and deep research. It has 280 billion total...

Baidu

Baidu: ERNIE-Light-DT-1.0

ERNIE-Light-DT-1.0 is based on open-source GLM models and includes research findings from Baidu Search's Lightning large model. It features Baidu Sparse Attention (BSA), a unique sparse attention mechanism developed by...

Liquid

LiquidAI: LFM3-1.7B

A compact 1.7B-parameter text model with a 256K-token context, post-trained for agents, tool calling, and structured outputs. It reasons before it answers. Prompts and outputs may be retained and used...

Build with OpenAI: gpt-oss-20b

Describe what you want to make and pick this model in the composer. A database and hosting are included.

Start with this model