GPT-5.6 Luna
GPT-5.6 LunaAlternatives?
CheaperGLM 5.3 FlashunstatedOpenwins 54%-47%$0.15 / $0.50Context: 1.05M → 1M+5BetterGLM 5.2maxOpenwins 55%+1,404%$1.28Context: 1.05M → 1M+1
CheaperHy3unstatedOpensame-49%$0.13 / $0.53Context: 1.05M → 256K+1
CheaperMiMo v2.6 FlashunstatedOpensame-61%$0.14 / $0.28Context: 1.05M → 1M+4
CheaperGemma 4 31BunstatedOpensame-64%$0.10 / $0.34Context: 1.05M → 256KGLM 5.3 FlashunstatedOpenwins 54%-47%$0.15 / $0.50Context: 1.05M → 1M+5Hy3unstatedOpensame-49%$0.13 / $0.53Context: 1.05M → 256K+1MiMo v2.6 FlashunstatedOpensame-61%$0.14 / $0.28Context: 1.05M → 1M+4Gemma 4 31BunstatedOpensame-64%$0.10 / $0.34Context: 1.05M → 256KMiMo v2 Omniunstatedsame-61%$0.14 / $0.28Context: 1.05M → 262KGLM 5.2maxOpenwins 55%+1,404%$1.28Context: 1.05M → 1M+1
Muse Spark 1.2xhighwins 55%+1,411%$1.29Context: 1.05M → 1M+2GPT-5.5highwins 53%+1,540%$1.40Prompts with >272K input tokensGemini 3.6 Flashhighwins 54%+1,775%*$1.60Context: 1.05M → 1MGemini 4 Argonhighwins 59%+1,798%*$1.62Context: 1.05M → 1M+3GLM 5.2maxOpenwins 55%+1,404%$1.28Context: 1.05M → 1M+1
Kimi K3maxOpenwins 54%+2,244%$2.00Context: 1.05M → 1M+4GLM 5.3 FlashunstatedOpenwins 54%-47%$0.15 / $0.50Context: 1.05M → 1M+5GLM 5.1unstatedOpenwins 53%+378%$1.40 / $4.40Context: 1.05M → 203K+1MiMo v2.5 ProunstatedOpenwins 53%+21%$0.43 / $0.87Context: 1.05M → 1M+1GPT-5.5highwins 53%+1,540%$1.40Prompts with >272K input tokensGPT-5.4highsame—$2.50 / $15GPT-5.6 Terraxhighsame+640%$0.63Prompts with >272K input tokensGPT-6.1 Solmaxsame+749%$0.72Remove unsupported parameters+5GPT-5.6 Solxhighsame+1,288%$1.18GPT-5.1highsame—$1.25 / $10Context: 1.05M → 400KGPT-6 Astramaxwins 47%+3,717%$3.26Monitoring can return HTTP 403+2GPT-5.2highwins 45%—$1.75 / $14Context: 1.05M → 400KAll OpenAI models →History
2 versionsBenchmarks
in Chat & KnowledgeFAQ
How much does GPT-5.6 Luna cost?›
$0.20 per 1M input tokens and $1.20 per 1M output tokens; cached input $0.02 per 1M. A typical benchmark task costs about $0.085 at xhigh effort.
Is GPT-5.6 Luna free to use?›
There is no free API; the cheapest paid price is $0.20 per 1M input tokens.
How good is GPT-5.6 Luna, and what is it best at?›
#58 of 336 in Chat & Knowledge, #47 of 134 in Coding, #43 of 135 in Agents & Tool Use, #68 of 197 in Writing & Language, #30 of 125 in Vision & Documents. Strongest at: Agents & work tasks, Reasoning, Science, Long context, Vision.
Is GPT-5.6 Luna better than Claude Sonnet 5.5?›
On Arena Text · Spanish, GPT-5.6 Luna scores 1,445.3 vs 1,446 — about the same. It is 96% cheaper per task.
How can I use GPT-5.6 Luna?›
Through the API of Amazon Bedrock, Azure, OpenAI.
What is the context window of GPT-5.6 Luna?›
1.05M tokens, with up to 128K output tokens.
When was GPT-5.6 Luna released? Is there a newer version?›
Released 2026-07-09. It has been superseded by GPT-6 Luna.
Is GPT-5.6 Luna open source?›
No, GPT-5.6 Luna is a closed model available through an API. The closest open-weights option here is GLM 5.2.
Can GPT-5.6 Luna read images?›
It accepts text and images, PDF files as input.
What is GPT-5.6 Luna?›
GPT-5.6 Luna is a closed language model from OpenAI, released Jul 2026, the successor to GPT-4.1 Nano.
What are the best alternatives to GPT-5.6 Luna?›
GLM 5.3 Flash (cheaper), GLM 5.2 (better).