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gpt-oss-20b

OpenRouter · chat model

gpt-oss-20b is listed here as a chat model from OpenRouter. This page shows simple API pricing, token limits, and capability flags so you can compare it with similar options.

Input
$0.0200 / 1M tokens
Output
$0.1000 / 1M tokens
Cached input
N/A
Context
32.8K
Compare similar models Open a side-by-side table using this route and the closest match from the current catalog. Estimate workload cost Use token counts, request volume, and cache assumptions to check a realistic monthly bill. Explore benchmark family Review source-backed benchmark rows for the attached base model family. Check data sources See how pricing data is generated and what still needs provider verification.

Quick read

Best for

Use this page when you need a fast view of cost, context size, and supported features before testing the model in your own workload.

Things to verify

Always check the provider page for discounts, cache pricing, region rules, and any model limits that may not appear in public metadata.

Pricing

Item Price
Input
$0.0200 / 1M tokens
Output
$0.1000 / 1M tokens
Embedding
$0.0200 / 1M tokens

Token limits

Context window
32.8K
Max input tokens
131.1K
Max output tokens
32.8K
Max tokens
32.8K

Capabilities

Capability Supported
Vision —
Function calling ✅
Parallel function calling ✅
Tool choice ✅
Prompt caching —
Reasoning ✅
Response schema ✅
System messages —
Audio input —
Audio output —
Web search —
PDF input —
Video input —

Benchmarks

Most benchmark rows are attached to the base model family rather than this provider route. Open benchmark explorer

Benchmark Score Metric Scope Checked Source
SWE-bench Verified 60.7% accuracy (%) Base model: gpt-oss-20b (gpt-oss-20b) 2026-05-31 Link
Codeforces 2516 Elo Elo Base model: gpt-oss-20b (gpt-oss-20b) 2026-05-31 Link
AIME 2025 (no tools) 92.5% Accuracy (%) Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
AIME 2025 (no tools) 91.7% Accuracy (%) Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
GPQA Diamond 80.1% Accuracy (%) Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
GPQA Diamond 71.5% Accuracy (%) Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
MMLU 90.0% Accuracy (%) Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
MMLU 85.3% Accuracy (%) Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
SWE-bench Verified 62.4% Accuracy (%) Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
SWE-bench Verified 60.7% Accuracy (%) Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
Codeforces (with tools) 2622 Elo Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
Codeforces (with tools) 2516 Elo Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
HealthBench 57.6% Score (%) Base model: gpt-oss (gpt-oss-120b) 2026-05-31 Link
HealthBench 42.5% Score (%) Base model: gpt-oss (gpt-oss-20b) 2026-05-31 Link
Artificial Analysis Intelligence Index 24.5 score Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
Artificial Analysis Coding Index 18.5 score Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
Artificial Analysis Agentic Index 27.6 score Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
GPQA Diamond 68.8% accuracy Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
Humanity's Last Exam 9.8% accuracy Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
IFBench 65.1% accuracy Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
SciCode 34.4% accuracy Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
Terminal-Bench Hard 10.6% accuracy Base model: gpt-oss (openai/gpt-oss-20b:free) 2026-05-31 Link
Artificial Analysis Intelligence Index 33.3 score Base model: gpt-oss (openai/gpt-oss-120b) 2026-05-31 Link
Artificial Analysis Coding Index 28.6 score Base model: gpt-oss (openai/gpt-oss-120b) 2026-05-31 Link
Artificial Analysis Agentic Index 37.9 score Base model: gpt-oss (openai/gpt-oss-120b) 2026-05-31 Link

Sources

Source links
Pricing data LiteLLM model cost map
Synced at 2026-05-28

Docs

Official docs

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Comparing from
Model Cost Input shape Features Context Why it is close
gpt-oss-20b
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In $0.0200 / 1M tokens
Out $0.1000 / 1M tokens
text
Output: text
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Current model
Reference row

Overall blends cost, modality overlap, capabilities, and context.

Model Cost Input shape Features Context Why it is close
gpt-oss-120b
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In $0.1800 / 1M tokens
Out $0.8000 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
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Overall 82%
qwen2.5-7b-instruct
novita
In $0.0700 / 1M tokens
Out $0.0700 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceResponse schema
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Text covered
Overall 82%
mimo-v2-flash
novita
In $0.1000 / 1M tokens
Out $0.3000 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
32.0K
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llama-3.2-3b-instruct
novita
In $0.0300 / 1M tokens
Out $0.0500 / 1M tokens
text
Output: text
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32.0K
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qwen3-coder-30b-a3b-instruct
novita
In $0.0700 / 1M tokens
Out $0.2700 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceResponse schema
32.8K
Text covered
Overall 78%
qwen3-next-80b-a3b-thinking
novita
In $0.1500 / 1M tokens
Out $1.5000 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
32.8K
Text covered
Overall 78%
glm-4.7-flash
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In $0.0700 / 1M tokens
Out $0.4000 / 1M tokens
text
Output: text
Function callingTool choiceReasoning
32.0K
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Overall 72%
gpt-oss-120b
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In $0.1500 / 1M tokens
Out $0.6000 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
131.1K
Text covered
Overall 72%
deepseek-v3.2
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In $0.2690 / 1M tokens
Out $0.4000 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
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deepseek-v3.2-exp
novita
In $0.2700 / 1M tokens
Out $0.4100 / 1M tokens
text
Output: text
Function callingParallel function callingTool choiceReasoning
65.5K
Text covered
Overall 72%
Qwen2.5-7B-Instruct
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In $0.0400 / 1M tokens
Out $0.1000 / 1M tokens
text
Output: text
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32.8K
Text covered
Overall 71%
qwen-2.5-coder-32b-instruct
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In $0.1800 / 1M tokens
Out $0.1800 / 1M tokens
text
Output: text
Tool choice
33.8K
Same provider
Overall 67%
mimo-v2-flash
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In $0.1000 / 1M tokens
Out $0.3000 / 1M tokens
text
Output: text
Function callingTool choiceReasoning
16.4K
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qwen3-235b-a22b-2507
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In $0.0710 / 1M tokens
Out $0.1000 / 1M tokens
text
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glm-4.7
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Out $2.2000 / 1M tokens
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mimo-v2.5-pro
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In $1.0000 / 1M tokens
Out $3.0000 / 1M tokens
text
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Function callingTool choiceReasoningResponse schema
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kimi-k2-thinking
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Out $2.5000 / 1M tokens
text
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Function callingParallel function callingTool choiceReasoning
262.1K
Text covered
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gemma-3-4b-it
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In $0.0400 / 1M tokens
Out $0.0800 / 1M tokens
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google.gemma-3-4b-it
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Out $0.0800 / 1M tokens
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llama-3.2-3b
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In $0.0400 / 1M tokens
Out $0.0800 / 1M tokens
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Missing text
gemma3-4b
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In $0.0300 / 1M tokens
Out $0.0800 / 1M tokens
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Meta-Llama-3.2-1B-Instruct
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Out $0.0800 / 1M tokens
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