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OpenAI · Released Aug 5, 2025

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…

ReasoningOpen weights
Compare in showdown → OpenRouter ↗ All OpenAI models
Released
Aug 5 2025
Context window
131K 66K out
Input / 1M tokens
$0.15 from $0.03
Output / 1M tokens
$0.60 from $0.15

Where to run it

22 providers compared

Cheapest: Venice, Near AI at $0.03 / $0.15 per 1M input / output tokens — 87% less than the priciest option.

ProviderInputOutputCache readContextMax outputUptimevs. best
VeniceINT4 $0.03 $0.15 $0.03128K33K99.9%24h Cheapest
Near AIFP4 $0.03 $0.15 $0.015131K118K99.7%24h Cheapest
CoreWeaveFP4 $0.03 $0.17 $0.03131K118K99%24h +8%
DekaLLMBF16 $0.03 $0.18 $0.03131K118K100%24h +13%
AkashMLBF16 $0.03 $0.19 $0.03131K118K99.9%24h +15%
DeepInfraBF16 $0.037 $0.17 —131K118K98.7%24h +17%
CrusoeBF16 $0.05 $0.25 $0.05131K118K100%24h +67%
Mancer 2FP8 $0.05 $0.25 —131K118K99.4%24h +67%
NovitaFP4 $0.05 $0.25 —131K33K92.4%24h +67%
DigitalOceanno tool calling $0.06 $0.42 $0.012128K4K100%24h +150%
Googleglobal · no tool calling $0.09 $0.36 —131K118K78.7%24h +163%
BaseTenus · FP4 $0.10 $0.50 $0.10128K115K99.9%24h +233%
BaseTenFP4 $0.10 $0.50 $0.10128K115K99.7%24h +233%
Amazon Bedrockeu-west-1 · no tool calling $0.15 $0.60 —131K118K100%24h +337%
NebiusFP4 $0.15 $0.60 —131K118K100%24h +337%
Amazon Bedrockno tool calling $0.15 $0.60 —131K118K100%24h +337%
Groq $0.15 $0.60 $0.075131K66K100%24h +337%
Phala $0.15 $0.60 —131K33K94.1%24h +337%
SiliconFlowFP8 · no tool calling $0.15 $0.60 $0.075131K8K87.7%24h +337%
Together $0.15 $0.60 —131K118K87.2%24h +337%
ParasailFP4 $0.10 $0.75 $0.055131K118K98.4%24h +338%
Mara $0.15 $0.75 —131K118K87.4%24h +400%
SambaNova $0.14 $0.95 —131K118K100%24h +471%
CerebrasFP16 $0.35 $0.75 $0.35131K41K100%24h +650%

Value

Price vs. performance

10 models score higher for the same price or lesson GPQA Diamond, e.g. DeepSeek V4 Flash 0423.
25.3%49.0%72.7%96.4% $0.01$0.10$1.00$10.00$100.00 DeepSeek V4.1 Flash 1017 (DeepSeek) — 89.8% · $0.30/1M in Gemini 4 Argon (Google) — 96.4% · $2.00/1M in Claude Haiku 5.5 (Anthropic) — 89.6% · $0.10/1M in Mistral Large 4 (Mistral) — 88.1% · $0.68/1M in Claude Sonnet 5.5 (Anthropic) — 95.6% · $2.00/1M in Claude Opus 5.5 (Anthropic) — 90.6% · $4.00/1M in Grok 4.7 (xAI) — 92.7% · $2.00/1M in DeepSeek V4.1 Flash (DeepSeek) — 89.8% · $0.056/1M in Qwen3.8 Max (0902) (Qwen) — 92.7% · $2.00/1M in Gemini 3.8 Flash (Google) — 95.4% · $0.82/1M in GLM 5.3 Flash (Z.ai) — 90.1% · $0.047/1M in GLM 5.3 (Z.ai) — 90.9% · $0.079/1M in Gemini 3.7 Flash (Google) — 94.8% · $0.75/1M in DeepSeek V4 Pro 0813 (DeepSeek) — 91.7% · $0.66/1M in Grok 4.6 (xAI) — 94.0% · $2.00/1M in DeepSeek V4 Flash 0731 (DeepSeek) — 91.0% · $0.44/1M in Qwen3.7 Flash (Qwen) — 82.3% · $0.03/1M in Claude Opus 5 (Anthropic) — 93.9% · $5.00/1M in Gemini 3.6 Flash (Google) — 94.1% · $0.75/1M in Gemini 3.5 Flash Lite (Google) — 83.3% · $0.30/1M in Kimi K3 (Moonshot AI) — 93.1% · $0.24/1M in Grok 4.5 (xAI) — 93.4% · $2.00/1M in Claude Sonnet 5 (Anthropic) — 90.5% · $2.00/1M in GLM 5.2 (Z.ai) — 91.9% · $0.62/1M in Kimi K2.7 Code (Moonshot AI) — 87.9% · $0.67/1M in Claude Fable 5 (Anthropic) — 85.9% · $10.00/1M in Qwen3.7 Plus (Qwen) — 87.9% · $0.32/1M in MiniMax M3 (MiniMax) — 90.9% · $0.30/1M in Claude Opus 4.8 (Anthropic) — 91.0% · $5.00/1M in Qwen3.7 Max (Qwen) — 90.9% · $1.48/1M in Gemini 3.5 Flash (Google) — 92.8% · $1.50/1M in Gemini 3.1 Flash Lite (Google) — 81.8% · $0.25/1M in Grok 4.3 (xAI) — 88.8% · $1.25/1M in Qwen3.5 Plus 2026-04-20 (Qwen) — 84.9% · $0.30/1M in Qwen3.6 Flash (Qwen) — 83.3% · $0.19/1M in Qwen3.6 35B A3B (Qwen) — 84.9% · $0.10/1M in Qwen3.6 27B (Qwen) — 85.9% · $0.25/1M in DeepSeek V4 Pro 0423 (DeepSeek) — 91.7% · $0.95/1M in DeepSeek V4 Flash 0423 (DeepSeek) — 91.0% · $0.091/1M in Kimi K2.6 (Moonshot AI) — 90.8% · $0.65/1M in Claude Opus 4.7 (Anthropic) — 90.1% · $5.00/1M in GLM 5.1 (Z.ai) — 89.9% · $0.97/1M in Gemma 4 26B A4B (Google) — 73.2% · $0.09/1M in Gemma 4 31B (Google) — 75.8% · $0.20/1M in Qwen3.6 Plus (Qwen) — 88.4% · $0.33/1M in Mistral Small 4 (Mistral) — 47.5% · $0.15/1M in Qwen3.5-9B (Qwen) — 79.0% · $0.10/1M in Gemini 3.1 Flash Lite Preview (Google) — 81.8% · $0.25/1M in Qwen3.5-35B-A3B (Qwen) — 83.5% · $0.15/1M in Gemini 3.1 Pro Preview (Google) — 94.4% · $2.00/1M in Claude Sonnet 4.6 (Anthropic) — 87.4% · $3.00/1M in Qwen3.5 397B A17B (Qwen) — 86.4% · $0.39/1M in GLM 5 (Z.ai) — 87.8% · $0.60/1M in Claude Opus 4.6 (Anthropic) — 90.5% · $5.00/1M in GLM 4.7 Flash (Z.ai) — 60.5% · $0.061/1M in GLM 4.7 (Z.ai) — 83.3% · $0.54/1M in Gemini 3 Flash Preview (Google) — 89.4% · $0.50/1M in Ministral 3 8B 2512 (Mistral) — 27.2% · $0.15/1M in Ministral 3 3B 2512 (Mistral) — 25.3% · $0.10/1M in Mistral Large 3 2512 (Mistral) — 51.3% · $0.50/1M in Claude Opus 4.5 (Anthropic) — 86.1% · $5.00/1M in Claude Haiku 4.5 (Anthropic) — 71.2% · $1.00/1M in Claude Sonnet 4.5 (Anthropic) — 82.3% · $3.00/1M in Claude Opus 4.1 (Anthropic) — 77.3% · $15.00/1M in Qwen3 30B A3B Instruct 2507 (Qwen) — 55.6% · $0.09/1M in Qwen3 235B A22B Thinking 2507 (Qwen) — 80.0% · $0.45/1M in Qwen3 235B A22B Instruct 2507 (Qwen) — 70.7% · $0.09/1M in Gemini 2.5 Pro (Google) — 85.3% · $1.25/1M in Gemini 2.5 Pro Preview 06-05 (Google) — 85.3% · $1.25/1M in R1 0528 (DeepSeek) — 76.3% · $0.50/1M in Qwen3 30B A3B (Qwen) — 61.7% · $0.12/1M in Qwen3 14B (Qwen) — 63.8% · $0.12/1M in Qwen3 32B (Qwen) — 65.7% · $0.08/1M in GPT-6.1 Sol (OpenAI) — 95.4% · $2.00/1M in GPT-6 Luna (OpenAI) — 90.5% · $0.10/1M in GPT-6 Sol (OpenAI) — 94.3% · $2.00/1M in GPT-6 Astra (OpenAI) — 95.8% · $10.00/1M in GPT-5.6 Luna (OpenAI) — 91.6% · $0.20/1M in GPT-5.6 Terra (OpenAI) — 93.3% · $2.00/1M in GPT-5.6 Sol (OpenAI) — 93.5% · $4.00/1M in GPT-5.5 (OpenAI) — 90.7% · $5.00/1M in GPT-5.4 Nano (OpenAI) — 78.5% · $0.20/1M in GPT-5.4 Mini (OpenAI) — 86.9% · $0.75/1M in GPT-5.4 Pro (OpenAI) — 94.6% · $30.00/1M in GPT-5.4 (OpenAI) — 93.3% · $2.50/1M in GPT-5.2 (OpenAI) — 91.4% · $1.75/1M in GPT-5.1 (OpenAI) — 87.6% · $1.25/1M in GPT-5 (OpenAI) — 86.2% · $1.25/1M in GPT-5 Mini (OpenAI) — 75.0% · $0.25/1M in GPT-5 Nano (OpenAI) — 69.4% · $0.05/1M in gpt-oss-20b (OpenAI) — 60.8% · $0.018/1M in gpt-oss-120b (OpenAI) — 75.8% · $0.15/1M in gpt-oss-120b

gpt-oss-120b Other OpenAI Other labs Value frontier · GPQA Diamond vs. input price per 1M tokens (log scale) · Drag to pan, pinch or Ctrl + scroll to zoom, double-click to zoom in.

Benchmarks

13 benchmark scores

BenchmarkScoreRankLeader
Terminal-BenchSoftware engineering · Tasks completed with the programs in a real terminal (best agent) 18.7% #37of 40 GPT-5.584.7%
SciCodeSoftware engineering · Research-coding problems from the natural sciences 36.0% #87of 93 Claude Opus 5.566.9%
Aider PolyglotSoftware engineering · Hard Exercism problems in many languages 41.8% #9of 11 GPT-588.0%
METR time horizonSoftware engineering · Length of software task solved more often than not 42 min #12of 13 Claude Opus 4.612 h
APEX-AgentsAgents & computer use · Long professional tasks in banking, consulting and law 4.4% #51of 51 Gemini 4 Argon82.4%
Vending-Bench 2Agents & computer use · Run a simulated vending business for a year (final balance) $-22 #59of 61 GPT-6 Astra$15,515
Lech Mazur WritingWriting & content · Short stories weaving 10 required elements, judged 0–10 7.71/10 #10of 13 GPT-58.60/10
Fiction.LiveBenchWriting & content · Understanding long creative writing (16k tokens) 44.4% #13of 15 GPT-597.2%
GPQA DiamondReasoning & knowledge · PhD-level biology, chemistry and physics questions 75.8% #76of 92 Gemini 4 Argon96.4%
SimpleBenchReasoning & knowledge · Common-sense trick questions about space, time and people 22.1% #43of 43 Claude Fable 581.9%
CritPtReasoning & knowledge · Open-ended, research-level physics problems 1.1% #75of 96 GPT-5.6 Sol32.3%
LMCAReasoning & knowledge · Judge the quality of conceptual arguments like experts 22.1% #88of 96 Claude Sonnet 5.568.3%
OTIS Mock AIMEMaths · Competition-style problems harder than MATH Level 5 88.9% #51of 90 Gemini 4 Argon100.0%

Specs

Details

Model ID
openai/gpt-oss-120b
Developer
OpenAI
Release date
Aug 5, 2025 ·
Context window
131,072 tokens
Max output
65,536 tokens
API price
$0.15 / $0.60 per 1M input / output tokens
Providers
22
Input types
text
Reasoning
Yes
Tool calling
Yes
Open weights
Yes
Free tier
No

Release date, prices and providers from OpenRouter's catalog; buying directly from a provider can cost a little differently. Uptime is the share of OpenRouter requests each provider served over the last day. Benchmark scores are the best result per benchmark from Epoch AI, licensed CC BY 4.0. Rank counts every model tracked here with a score.