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OpenAI: GPT-5 Nano Coding Benchmark

GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...

Context400,000tokens
Max Output128,000tokens
Inputmodalities
Price$0.05/1M input

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Coding Performance

Coding benchmarks and performance metrics for development tasks

OpenClaw Benchmarks

PinchBench measures how OpenAI: GPT-5 Nano performs on real OpenClaw agent tasks: multi-step execution, tool use, recovery, latency, and cost.

Average score

61.0%

#47 of 50 official models

Average time

14m 53s

27 runs · per OpenClaw task

Average cost

$0.037

Per benchmark run

Category breakdown

Best verified PinchBench v2 run by OpenClaw task family.

Uncategorized94.3% · 4/11 cleared

Top task results

Highest-scoring benchmark tasks from the same submission.

Uncategorized
00 Sanity
100.0%
Uncategorized
01 Calendar
100.0%
Uncategorized
04 Weather
100.0%
Uncategorized
09 Files
100.0%
Uncategorized
03 Blog
96.0%
Uncategorized
05 Summary
96.0%

Autonomous task execution

OpenAI: GPT-5 Nano shows emerging average success across OpenClaw-style benchmark runs, useful for recurring research, browser, and file-based automations.

Tool use and recovery

PinchBench tasks stress multi-step planning, tool calls, and judge-verified completion rather than single prompt coding snippets.

Agent workflow fit

Its deliberate average runtime and cost-aware run cost help set expectations for long-running agents and production workflows.

Agentic benchmarks from the PinchBench Leaderboard

Real-World Usage

Real-world usage statistics from the Kilo Code community

No usage data available for this model yet.

No ranking data available for this model yet.

Real-world metrics from the Kilo Code Leaderboard

Pricing

Cost per 1 million tokens

Input Tokens
$0.05
per 1M tokens
Output Tokens
$0.40
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.0060

Coding Capabilities

Features and parameters relevant to coding tasks

Coding Features

Function Calling
Can call external functions/APIs
Tool Choice
Control over function selection
Structured Outputs
JSON schema validation
Reasoning Tokens
Extended thinking for complex problems

Pricing details from OpenRouter

Technical Details

Architecture and implementation specifications

Specifications
Model ID
openai/gpt-5-nano
Created
August 7, 2025
Tokenizer
GPT
Input Modalities
TextImageFile
Context Window
400,000 tokens
Max Completion Tokens
128,000 tokens
Input Price
$0.05 per 1M tokens
Output Price
$0.40 per 1M tokens
Cache Read Price
$0.01 per 1M tokens
Content Moderation
Enabled

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