gpt-oss-20b

Name: gpt-oss-20b
Author: OpenAI

Released

2025-08-05

Last refreshed

2026-06-30

Status

Researched 150d ago

Open sourceCommercial use: permittedRAGAgentsLong contextClassificationJSON / Tool use

gpt-oss-20b is worth evaluating for rag, agents, and long context when its provider route and context window match the workload.

Use it for

Teams evaluating rag, agents, and long context
Workloads that can use a 131k context window
Buyers comparing 4 tracked provider routes

Do not use it for

Vision or document-understanding workloads

Specifications

Family: GPT-OSS
Released: 2025-08-05
Context: 131k
Parameters: 20B
Architecture: Decoder Only
Knowledge cutoff: 2025-08
Specialization: general
Openness: Open source
License: Apache 2.0OSI-approvedCommercial use: permitted
Weights: Unknown
Code: Unknown
Training: Pretrained

Created by

OpenAI

Cutting-edge research and development.

San Francisco, California, United States

Founded 2015

Website

Pricing

Output / 1M

Free

Input / 1M

Free

Cheapest of 10 routes · Open Inference

Providers(10)

Cloudflare Workers AI OpenRouter Fireworks AI GCP Vertex AI NVIDIA NIM GroqCloud Replicate API Vercel AI Gateway Novita AI Open Inference

View 10 provider routes

About

OpenAI open-weight model with 20 billion parameters. Lightweight, efficient text-only model with reasoning and function calling. Free for self-hosting. Released August 5, 2025.

Top use-case fit: coding, agents, and build tasks

RAG

Included by capability and metadata signals in the decision map.

Agents

Included by capability and metadata signals in the decision map.

Long context

Included by capability and metadata signals in the decision map.

Provider price ladder

Compare all 10

Compare API pricing across 4 providers for input and output tokens, batch, and cached reads when available.

Provider	Input / 1M	Output / 1M	Route
Open Inference	Free	Free	Serverless
OpenRouter	$0.030	$0.140	Serverless
Novita AI	$0.040	$0.150	Serverless
Vercel AI Gateway	$0.050	$0.200	Serverless

Available via routers & gateways(14)

LiteLLM

Gateway

Open-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.

Free OSSGCP Vertex AI

OpenRouter

Hybrid

Unified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.

PassthroughGCP Vertex AIFireworks AI

Portkey

Gateway

Production AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.

SubscriptionGCP Vertex AI

AIRouter

Router

Commercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.

Passthrough + feeGCP Vertex AI

Helicone

Gateway

Observability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.

SubscriptionGCP Vertex AI

Kong AI Gateway

Gateway

Multi-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.

SubscriptionGCP Vertex AI

Capabilities

JSON / Tool useStructured Outputs

Benchmark peer barsfor RAG

No task-mapped benchmark peers are available for this model yet.

Benchmark scores(1)

Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.