GPT-5 Nano
GPT-5 NanoAlternatives?
BetterGPT-5.6 Lunalow+97%+227%$0.01
OpenDeepSeek V4.1 Flash 1017max×29.9+282%$0.26Pass back reasoning_content · Chat Completions+4BetterGPT-6 Lunamedium×6.9+45%$0.017Function calling only with none · Chat Completions+3
BetterClaude Haiku 5.5medium×3.6+45%$0.047Remove sampling parameters+5BetterGPT-6.1 Sollow×29.4+2,809%$0.13Remove unsupported parameters+5GPT-5.6 Lunalow+97%+227%$0.01GPT-6 Lunamedium×6.9+45%$0.017Function calling only with none · Chat Completions+3Claude Haiku 5.5medium×3.6+45%$0.047Remove sampling parameters+5GPT-6.1 Sollow×29.4+2,809%$0.13Remove unsupported parameters+5GPT-6 Sollow×12.1+2,809%$0.13DeepSeek V4.1 Flash 1017maxOpen×29.9+282%$0.26Pass back reasoning_content · Chat Completions+4
GLM 5.3 FlashmaxOpen×25.2+73%$0.28Defaults to max · Self-hosted+4DeepSeek V4 Pro 0813maxOpen×23.5+1,340%$0.67No image input+5
Kimi K3maxOpen×23.1+4,264%$2.00Sampling parameters are fixed+3
Muse Spark OpenxhighOpen×22+1,355%$0.84Reasoning off leaves output unchanged · Self-hosted / llama.cpp+1GPT-6 Astrahigh×35.3—$1.73Monitoring can return HTTP 403+2GPT-6.1 Solhigh×35.1—$0.32Remove unsupported parameters+5GPT-5.6 Solhigh×32.7—$0.81GPT-5.5 Prohigh×32.4—$30 / $180GPT-5.5high×31.9—$1.40Prompts with >272K input tokensGPT-5.4 Proxhigh×31.9—$30 / $180No strict JSONGPT-6 Solhigh×26.4—$0.37GPT-5.4high×25.9—$2.50 / $15All OpenAI models →History
5 versionsBenchmarks
in Chat & KnowledgeFAQ
How much does GPT-5 Nano cost?›
$0.05 per 1M input tokens and $0.40 per 1M output tokens; cached input $0.005 per 1M.
Is GPT-5 Nano free to use?›
There is no free API; the cheapest paid price is $0.05 per 1M input tokens.
How good is GPT-5 Nano, and what is it best at?›
#201 of 336 in Chat & Knowledge, #117 of 239 in Coding, #132 of 242 in Agents & Tool Use, #153 of 197 in Writing & Language, #96 of 125 in Vision & Documents. Strongest at: Instructions.
Is GPT-5 Nano better than Claude Haiku 4.5?›
On ARC-AGI-2 · semi-private, GPT-5 Nano scores 2.6 vs 4 — lower.
How can I use GPT-5 Nano?›
Through the API of Azure, OpenAI.
What is the context window of GPT-5 Nano?›
400K tokens, with up to 128K output tokens.
When was GPT-5 Nano released? Is there a newer version?›
Released 2025-08-07. It has been superseded by GPT-5.6 Luna.
Is GPT-5 Nano open source?›
No, GPT-5 Nano is a closed model available through an API. The closest open-weights option here is DeepSeek V4.1 Flash 1017.
Can GPT-5 Nano read images?›
It accepts text and images, PDF files as input.
What is GPT-5 Nano?›
GPT-5 Nano is a closed language model from OpenAI, released Aug 2025.
What are the best alternatives to GPT-5 Nano?›
GPT-5.6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).