GPT-5.6 Luna
GPT-5.6 LunaAlternatives?
CheaperGLM 5.3 FlashhighOpen×18.7-47%$0.15 / $0.50Context: 1.05M → 1M+5BetterGPT-6 Lunamedium×6.9+78%$0.017Function calling only with none · Chat Completions+3
OpenDeepSeek V4.1 Flash 1017high×29.9+17%$0.30 / $1.20Context: 1.05M → 1M+5RCheaperBeam 1.0 501B A23BxhighOpen×9.4-6%$0.24 / $0.98Context: 1.05M → 1M+1
CheaperNemotron 3.5 Super VLhighOpensame-71%$0.06 / $0.35Context: 1.05M → 1MGLM 5.3 FlashhighOpen×18.7-47%$0.15 / $0.50Context: 1.05M → 1M+5RBeam 1.0 501B A23BxhighOpen×9.4-6%$0.24 / $0.98Context: 1.05M → 1M+1Nemotron 3.5 Super VLhighOpensame-71%$0.06 / $0.35Context: 1.05M → 1MGPT-6 Lunalow-70%-54%$0.005Function calling only with none · Chat Completions+3GPT-5 Nanohigh-89%-69%$0.05 / $0.40Context: 1.05M → 400KGPT-6 Lunamedium×6.9+78%$0.017Function calling only with none · Chat Completions+3
Claude Haiku 5.5low×2.8+149%$0.024Context: 1.05M → 1M+6GPT-6.1 Sollow×28+1,231%$0.13Remove unsupported parameters+5GPT-6 Sollow×9.2+1,251%$0.13GPT-5.6 Terralow×5.3+1,370%$0.14Prompts with >272K input tokensDeepSeek V4.1 Flash 1017highOpen×29.9+17%$0.30 / $1.20Context: 1.05M → 1M+5GLM 5.3 FlashmaxOpen×24+2,786%$0.28Context: 1.05M → 1M+5DeepSeek V4 Pro 0813highOpen×22.9+340%$1.32 / $3.96Context: 1.05M → 1M+6
Kimi K3maxOpen×22.2+20,253%$2.00Context: 1.05M → 1M+4
Muse Spark OpenxhighOpen×20.6+8,492%$0.84Context: 1.05M → 1M+2GPT-6 Astralow×33.9+8,219%$0.82Monitoring can return HTTP 403+2GPT-5.4 Proxhigh×33.2—$30 / $180No strict JSONGPT-5.5 Prohigh×32.4—$30 / $180GPT-6.1 Sollow×28+1,231%$0.13Remove unsupported parameters+5GPT-5.6 Sollow×13.8+2,552%$0.26GPT-5.2 Promedium×13.6—$21 / $168Context: 1.05M → 400KGPT-5.5low×12.3—$5 / $30Prompts with >272K input tokensGPT-6 Sollow×9.2+1,251%$0.13All 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 $0.01 at low 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?›
#127 of 336 in Chat & Knowledge, #76 of 134 in Coding, #75 of 135 in Agents & Tool Use, #68 of 197 in Writing & Language, #59 of 125 in Vision & Documents.
Is GPT-5.6 Luna better than GPT-4.1 Nano?›
On ARC-AGI-2 · public evaluation, GPT-5.6 Luna scores 60.2 vs 0 — higher.
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 DeepSeek V4.1 Flash 1017.
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), GPT-6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).