GPT-5.6 Luna
GPT-5.6 LunaAlternatives?
CheaperLing 3.0 Flash VLthinkingOpen-32%-80%$0.06 / $0.18Context: 1.05M → 262KBetterGPT-6 Lunamedium+75%+12%$0.017Function calling only with none · Chat Completions+3
OpenDeepSeek V4.1 Flash 1017max×2.9+1,580%$0.26Context: 1.05M → 1M+5Lower effortSame modellow-49%-37%$0.01
BetterClaude Haiku 5.5medium+24%+202%$0.047Context: 1.05M → 1M+6Ling 3.0 Flash VLthinkingOpen-32%-80%$0.06 / $0.18Context: 1.05M → 262KGPT-6 Lunamedium+75%+12%$0.017Function calling only with none · Chat Completions+3Claude Haiku 5.5medium+24%+202%$0.047Context: 1.05M → 1M+6
MiMo v2.6 FlashthinkingOpen×2.8+300%$0.062Context: 1.05M → 1M+4GPT-6.1 Sollow×2.3+738%$0.13Remove unsupported parameters+5GPT-6 Sollow×2.3+751%$0.13DeepSeek V4.1 Flash 1017maxOpen×2.9+1,580%$0.26Context: 1.05M → 1M+5MiMo v2.6 FlashthinkingOpen×2.8+300%$0.062Context: 1.05M → 1M+4
GLM 5.3maxOpen×2.7+12,758%$2.01Context: 1.05M → 1M+5Ling 3.1 FlashOpen×2.7+6,309%$1.00Context: 1.05M → 1M+1GLM 5.3 FlashmaxOpen×2.6+1,718%$0.28Context: 1.05M → 1M+5GPT-6 Astramedium×2.8+9,777%$1.54Monitoring can return HTTP 403+2GPT-6.1 Solmedium×2.7+1,270%$0.21Remove unsupported parameters+5GPT-6 Solmedium×2.5+1,485%$0.25GPT-5.6 Solmedium×2.2+3,138%$0.50GPT-6 Lunamedium+75%+12%$0.017Function calling only with none · Chat Completions+3GPT-5.5medium+74%+5,681%$0.90Prompts with >272K input tokensGPT-5.5 Instant (June 2026)+58%+4,333%$0.69Context: 1.05M → 400KGPT-5.6 Terramedium+45%+1,076%$0.18Prompts with >272K input tokensAll OpenAI models →History
2 versionsBenchmarks
in Agents & Tool UseFAQ
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 $0.016 at medium 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?›
#98 of 334 in Chat & Knowledge, #62 of 132 in Coding, #55 of 133 in Agents & Tool Use, #56 of 195 in Writing & Language, #41 of 124 in Vision & Documents. Strongest at: Science.
Is GPT-5.6 Luna better than Step 5 Preview?›
On AutomationBench-AA, GPT-5.6 Luna scores 50.2 vs 51 — about the same. It is 98% 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 It has been superseded by GPT-6 Luna.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 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?›
Ling 3.0 Flash VL (cheaper), GPT-6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).