GPT-5.6 Luna
GPT-5.6 LunaAlternatives?
BetterClaude Opus 5unstated+14%+2,122%$5 / $25Context: 1.05M → 1M
OpenGLM 5.3unstated+8%+378%$1.40 / $4.40Context: 1.05M → 1M+5BetterClaude Fable 5.1unstated+13%+4,344%$10 / $50Context: 1.05M → 1M+6BetterClaude Opus 5.5unstated+12%+1,678%$4 / $20Context: 1.05M → 1M+6BetterClaude Fable 5unstated+10%+4,344%$10 / $50Context: 1.05M → 1MClaude Opus 5unstated+14%+2,122%$5 / $25Context: 1.05M → 1MClaude Fable 5.1unstated+13%+4,344%$10 / $50Context: 1.05M → 1M+6Claude Opus 5.5unstated+12%+1,678%$4 / $20Context: 1.05M → 1M+6Claude Fable 5unstated+10%+4,344%$10 / $50Context: 1.05M → 1M
Grok 4.7unstated+10%+567%$2 / $6Context: 1.05M → 500K+5GLM 5.3unstatedOpen+8%+378%$1.40 / $4.40Context: 1.05M → 1M+5
Kimi K3unstatedOpen+5%+1,233%$3 / $15Context: 1.05M → 1M+4Kimi K2.6unstatedOpen+4%+281%$0.95 / $4Context: 1.05M → 256KGLM 5.2unstatedOpen+3%+378%$1.40 / $4.40Context: 1.05M → 1M+1
DeepSeek V4 Pro 0813unstatedOpensame+340%$1.32 / $3.96Context: 1.05M → 1M+6GPT-6 Solunstated+10%—$2 / $10GPT-6 Astraunstated+10%—$10 / $50Monitoring can return HTTP 403+2GPT-5.6 Solunstated+8%—$4 / $20GPT-5.4unstated+4%—$2.50 / $15GPT-5.5unstated+4%—$5 / $30Prompts with >272K input tokensGPT-5.6 Terraunstated+3%—$2 / $12Prompts with >272K input tokensGPT-5.4 Miniunstated-3%—$0.75 / $4.50Context: 1.05M → 400KGPT-5 (2025-08-07)unstated-4%—$1.25 / $10Context: 1.05M → 400KAll OpenAI models →Benchmarks
in Writing & LanguageFAQ
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 GPT-4.1 Nano?›
On EQ-Bench Longform Creative Writing 1.11, GPT-5.6 Luna scores 75.5 vs 32.4 — 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 It has been superseded by GPT-6 Luna.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 GLM 5.3.
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?›
Claude Opus 5 (better), GLM 5.3 (open weights).