GPT-5.6 Luna
GPT-5.6 LunaAlternatives?
CheaperMuse Glimmer 30BhighOpensame-68%$0.058Context: 1.05M → 131K
BetterClaude Haiku 5.5max×3.3+19%$0.21Context: 1.05M → 1M+6
OpenGLM 5.3 Flashmax×2.6+59%$0.28Context: 1.05M → 1M+5Lower effortSame modelxhigh-17%-52%$0.085
CheaperMiMo v2.6 ProthinkingOpen-6%-25%$0.13Context: 1.05M → 1M+4Muse Glimmer 30BhighOpensame-68%$0.058Context: 1.05M → 131KMiMo v2.6 ProthinkingOpen-6%-25%$0.13Context: 1.05M → 1M+4GPT-6 Lunamax-17%-62%$0.068Function calling only with none · Chat Completions+3MiMo v2.5 ProthinkingOpen-51%-70%$0.054Context: 1.05M → 1M+1Claude Haiku 5.5max×3.3+19%$0.21Context: 1.05M → 1M+6GLM 5.3 FlashmaxOpen×2.6+59%$0.28Context: 1.05M → 1M+5GPT-5.6 Terraxhigh+11%+254%$0.63Prompts with >272K input tokensGPT-6.1 Solmax+74%+306%$0.72Remove unsupported parameters+5Muse Spark 1.2xhigh+60%+447%$0.97Context: 1.05M → 1M+2GLM 5.3 FlashmaxOpen×2.6+59%$0.28Context: 1.05M → 1M+5GLM 5.3maxOpen×2.5+1,025%$2.01Context: 1.05M → 1M+5
Kimi K3maxOpen+97%+1,022%$2.00Context: 1.05M → 1M+4
Qwen3.8 27BxhighOpen+11%+465%$1.01Context: 1.05M → 262K+5Muse Glimmer 30BhighOpensame-68%$0.058Context: 1.05M → 131KGPT-6 Astramax+80%+1,727%$3.26Monitoring can return HTTP 403+2GPT-6.1 Solmax+74%+306%$0.72Remove unsupported parameters+5GPT-5.6 Terramax+63%+684%$1.40Prompts with >272K input tokensGPT-5.6 Solmax+34%+1,015%$1.99GPT-5.5xhigh-9%+1,377%$2.63Prompts with >272K input tokensGPT-6 Lunamax-17%-62%$0.068Function calling only with none · Chat Completions+3GPT-6 Solmax-17%+486%$1.04GPT-5.4 Nanoxhigh-74%same$0.18Context: 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 $0.18 at max 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?›
#47 of 334 in Chat & Knowledge, #37 of 132 in Coding, #35 of 133 in Agents & Tool Use, #56 of 195 in Writing & Language, #29 of 124 in Vision & Documents. Strongest at: Agents & work tasks, Reasoning, Science, Long context, Vision.
Is GPT-5.6 Luna better than Qwen3.8 Max (0902)?›
On MLCR-AA, GPT-5.6 Luna scores 19.4 vs 20 — about the same. It is 97% 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 5.3 Flash.
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?›
Muse Glimmer 30B (cheaper), Claude Haiku 5.5 (better), GLM 5.3 Flash (open weights).