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GPT OSS 120B

Open GPT reasoning model for self-hosted agents and controllable deployments

Source-linked gpt-oss Open weights Released 2025-08-05
API data Report
Input modalitiesT
Output modalitiesT
Input price$0.03/1M tokens
Output price$0.17/1M tokens
Context window131.072K
Max output32.768K
Overview

Capabilities and specifications

✓ Reasoning Yes
✓ Tool calling Yes
? Structured output Unknown
× Attachments No
× Vision input No
✓ Open weights Yes
Creator
OpenAI
Model family
gpt-oss
Knowledge cutoff
Not documented
License
Not documented
Release date
2025-08-05
Model ID
openai/gpt-oss-120b
Inference availability

Provider pricing and availability

Provider-specific identifiers, limits, and prices per million tokens.

Report a price
Providers offering GPT OSS 120B
ProviderProvider model IDContextInputOutputCache readCapabilitiesSource
Kenari gpt-oss-120b 131.072K Not listed Not listed - ReasoningToolsJSON Docs
Nvidia openai/gpt-oss-120b 128K Not listed Not listed - ReasoningToolsJSON Docs
Weights & Biases openai/gpt-oss-120b 131.072K $0.03 $0.17 $0.03 ReasoningToolsJSON Docs
LLM Gateway gpt-oss-120b 131.072K $0.032 $0.14 $0.032 ReasoningToolsJSON Docs
Deep Infra openai/gpt-oss-120b 131.072K $0.037 $0.17 - ReasoningToolsJSON Docs
OpenRouter openai/gpt-oss-120b 131.072K $0.037 $0.17 - ReasoningToolsJSON Docs
Kilo Gateway openai/gpt-oss-120b 131.072K $0.039 $0.19 - ReasoningTools Docs
IO.NET openai/gpt-oss-120b 131.072K $0.04 $0.4 $0.02 Tools Docs
NovitaAI openai/gpt-oss-120b 131.072K $0.05 $0.25 - ReasoningToolsJSON Docs
SiliconFlow openai/gpt-oss-120b 131K $0.05 $0.45 - ReasoningToolsJSON Docs
NanoGPT openai/gpt-oss-120b 128K $0.05 $0.25 - ReasoningToolsJSON Docs
Databricks databricks-gpt-oss-120b 131.072K $0.072 $0.28 - ReasoningToolsJSON Docs
Neon gpt-oss-120b 131.072K $0.072 $0.28 - ReasoningToolsJSON Docs
Abacus openai/gpt-oss-120b 128K $0.08 $0.44 - ReasoningToolsJSON Docs
Vertex openai/gpt-oss-120b-maas 131.072K $0.09 $0.36 - ReasoningTools Docs
Merge Gateway openai/gpt-oss-120b 131.072K $0.09 $0.36 - Reasoning Docs
Vercel AI Gateway openai/gpt-oss-120b 131.072K $0.1 $0.5 - ReasoningToolsJSON Docs
submodel openai/gpt-oss-120b 131.072K $0.1 $0.5 - ReasoningTools Docs
Baseten openai/gpt-oss-120b 128.072K $0.1 $0.5 - ReasoningToolsJSON Docs
Synthetic hf:openai/gpt-oss-120b 131.072K $0.1 $0.1 $0.1 ReasoningTools Docs
Fireworks AI accounts/fireworks/models/gpt-oss-120b 131.072K $0.15 $0.6 $0.015 ReasoningTools Docs
Nebius Token Factory openai/gpt-oss-120b 128K $0.15 $0.6 $0.015 ReasoningToolsJSON Docs
Groq openai/gpt-oss-120b 131.072K $0.15 $0.6 $0.075 ReasoningToolsJSON Docs
NEAR AI Cloud openai/gpt-oss-120b 131K $0.15 $0.55 - ReasoningToolsJSON Docs
Pioneer openai/gpt-oss-120b 131.072K $0.15 $0.6 $0.015 ReasoningToolsJSON Docs
Together AI openai/gpt-oss-120b 131.072K $0.15 $0.6 - ReasoningTools Docs
FrogBot gpt-oss-120b 131.072K $0.15 $0.6 - ReasoningToolsJSON Docs
FastRouter openai/gpt-oss-120b 131.072K $0.15 $0.6 - ReasoningTools Docs
AKI.IO gpt-oss-120b 128K $0.15 $0.55 - ReasoningToolsJSON Docs
ai& openai/gpt-oss-120b 131.072K $0.15 $0.6 - ReasoningToolsJSON Docs
Charm Hyper gpt-oss-120b 131.072K $0.178 $0.612 - ReasoningToolsJSON Docs
Berget.AI openai/gpt-oss-120b 128K $0.22 $0.83 - ReasoningToolsJSON Docs
GreenPT gpt-oss-120b 131.072K $0.228 $0.798 - ReasoningToolsJSON Docs
evroc openai/gpt-oss-120b 65.536K $0.23 $0.92 - ReasoningTools Docs
Hugging Face openai/gpt-oss-120b 131.072K $0.25 $0.69 - ReasoningToolsJSON Docs
Cloudflare Workers AI @cf/openai/gpt-oss-120b 128K $0.35 $0.75 - ReasoningToolsJSON Docs
Cerebras gpt-oss-120b 131.072K $0.35 $0.75 - ReasoningToolsJSON Docs
STACKIT openai/gpt-oss-120b 131K $0.53 $0.76 - ReasoningTools Docs
CloudFerro Sherlock openai/gpt-oss-120b 131K $2.92 $2.92 - ReasoningToolsJSON Docs

Capability badges appear only when the provider catalog explicitly lists support.

Serving quality

Performance and reliability

Observed serving measurements stay separate from model specifications and are never estimated from price or model size.

Throughput Not reported

Generation speed; higher is faster.

Latency / TTFT Not reported

Time until the first output token arrives.

Uptime Not reported

Successful requests over a measured period.

Performance varies by inference provider, region, and load. Provider-level measurements appear only when a source reports them.

Published evaluations

Benchmarks

Raw results remain attached to their original source and version.

Benchmark registry
Agentic Index - Unversioned - indexTop 8 reported models
Claude Opus 5
55.3
GPT-5.6 Sol
54.0
Anthropic: Claude Fable 5 (batch)
52.8
Claude Fable 5
52.8
Kimi K3
50.1
GPT-5.6 Terra
47.4
Anthropic: Claude Opus 4.8 (batch)
47.2
GPT OSS 120B
13.2
Coding Index - Unversioned - indexTop 8 reported models
Claude Opus 5
78.0
GPT-5.6 Sol
77.4
GPT-5.6 Terra
76.7
Anthropic: Claude Fable 5 (batch)
76.5
Claude Fable 5
76.5
Kimi K3
76.2
OpenAI: GPT-5.5 (batch)
74.9
GPT OSS 120B
30.4
Design Arena: 3d - Unversioned - eloTop 8 reported models
Kimi K3
1456.0
Claude Opus 5
1384.0
Anthropic: Claude Fable 5 (batch)
1373.0
Claude Fable 5
1373.0
Z.ai: GLM 5.2
1366.0
Z.ai: GLM 5.1
1336.0
Anthropic: Claude Opus 4.6 (batch)
1332.0
GPT OSS 120B
958.0
Design Arena: codecategories - Unversioned - eloTop 8 reported models
Kimi K3
1418.0
Claude Opus 5
1358.0
Z.ai: GLM 5.2
1346.0
Anthropic: Claude Fable 5 (batch)
1340.0
Claude Fable 5
1340.0
Anthropic: Claude Opus 4.6 (batch)
1324.0
Anthropic: Claude Opus 4.6
1324.0
GPT OSS 120B
994.0
Design Arena: dataviz - Unversioned - eloTop 8 reported models
Kimi K3
1382.0
Claude Opus 5
1378.0
Z.ai: GLM 5.1
1366.0
Google: Gemini 3.6 Flash (batch)
1350.0
Gemini 3.6 Flash
1350.0
Anthropic: Claude Fable 5 (batch)
1349.0
Claude Fable 5
1349.0
GPT OSS 120B
1029.0
Design Arena: gamedev - Unversioned - eloTop 8 reported models
Anthropic: Claude Fable 5 (batch)
1393.0
Claude Fable 5
1393.0
Z.ai: GLM 5.2
1358.0
Anthropic: Claude Sonnet 5 (batch)
1352.0
Claude Sonnet 5
1352.0
OpenAI: GPT-5.5 (batch)
1345.0
GPT-5.5
1345.0
GPT OSS 120B
1049.0
Design Arena: uicomponent - Unversioned - eloTop 8 reported models
Kimi K3
1413.0
Claude Opus 5
1406.0
Anthropic: Claude Fable 5 (batch)
1350.0
Claude Fable 5
1350.0
Anthropic: Claude Opus 4.7 (batch)
1339.0
Anthropic: Claude Opus 4.7
1339.0
Z.ai: GLM 5.2
1334.0
GPT OSS 120B
960.0
Design Arena: website - Unversioned - eloTop 8 reported models
Kimi K3
1375.0
Claude Opus 5
1343.0
Z.ai: GLM 5.2
1340.0
Anthropic: Claude Fable 5 (batch)
1323.0
Claude Fable 5
1323.0
xAI: Grok 4.5
1323.0
Google: Gemini 3.6 Flash (batch)
1322.0
GPT OSS 120B
993.0
Intelligence Index - Unversioned - indexTop 8 reported models
Claude Opus 5
60.7
Anthropic: Claude Fable 5 (batch)
59.9
Claude Fable 5
59.9
GPT-5.6 Sol
58.9
Kimi K3
57.1
Anthropic: Claude Opus 4.8 (batch)
55.7
Anthropic: Claude Opus 4.8
55.7
GPT OSS 120B
23.8
Catalog activity

Recent record changes

Detected changes from successful source imports.

Full change log
Max Output Tokens131072 → 32768
Price Completion0.16999999999999998 → 0.17
Price Prompt0.037 → 0.03
Price Completion0.17 → 0.16999999999999998
Max Output Tokens32768 → 131072
Price Prompt0.03 → 0.037
Price Completion0.16999999999999998 → 0.17
Max Output Tokens131072 → 32768
Public API

Use this record

Fetch the complete source-linked model record without an API key.

API documentation
Endpoint
GET https://www.modelbench.lol/api/v1/models/openai/gpt-oss-120b
curl
curl "https://www.modelbench.lol/api/v1/models/openai/gpt-oss-120b"