GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperMuse Glimmer 30BhighOpen×2.2-60%$0.058Context: 1.05M → 131KBetterGPT-5.6 Lunahigh+37%-70%$0.044
OpenGLM 5.3 Flashmax×5.7+96%$0.28Context: 1.05M → 1M+5
CheaperMiMo v2.6 ProthinkingOpen×2.1-8%$0.13Context: 1.05M → 1M+4CheaperGPT-6 Lunamax+81%-53%$0.068Function calling only with none · Chat Completions+3Muse Glimmer 30BhighOpen×2.2-60%$0.058Context: 1.05M → 131KMiMo v2.6 ProthinkingOpen×2.1-8%$0.13Context: 1.05M → 1M+4GPT-6 Lunamax+81%-53%$0.068Function calling only with none · Chat Completions+3GPT-5.6 Lunaxhigh+81%-41%$0.085TInklingxhighOpen+37%-62%$0.95 / $4.05Context: 1.05M → 256K+1GPT-5.6 Lunahigh+37%-70%$0.044Muse Glimmer 30BhighOpen×2.2-60%$0.058Context: 1.05M → 131KGPT-6 Lunamax+81%-53%$0.068Function calling only with none · Chat Completions+3MiMo v2.6 ProthinkingOpen×2.1-8%$0.13Context: 1.05M → 1M+4
Claude Haiku 5.5max×7.1+47%$0.21Context: 1.05M → 1M+6GLM 5.3 FlashmaxOpen×5.7+96%$0.28Context: 1.05M → 1M+5GLM 5.3maxOpen×5.4+1,288%$2.01Context: 1.05M → 1M+5
Kimi K3maxOpen×4.3+1,285%$2.00Context: 1.05M → 1M+4
Qwen3.8 27BxhighOpen×2.4+597%$1.01Context: 1.05M → 262K+5Muse Glimmer 30BhighOpen×2.2-60%$0.058Context: 1.05M → 131KGPT-6 Astramax×3.9+2,155%$3.26Monitoring can return HTTP 403+2GPT-6.1 Solmax×3.8+401%$0.72Remove unsupported parameters+5GPT-6 Lunamax+81%-53%$0.068Function calling only with none · Chat Completions+3GPT-6 Solmax+81%+623%$1.04GPT-5.6 Sollow+44%+80%$0.26GPT-5.5low+25%—$5 / $30Prompts with >272K input tokensGPT-5.6 Lunalow-31%-93%$0.01GPT-5.4 Nanoxhigh-44%+27%$0.18Context: 1.05M → 400KAll OpenAI models →Benchmarks
in Chat & KnowledgeWatch out 1
Prompts with >272K input tokens›
Above 272K input tokens, input costs 2× and output 1.5× for the full request. Source ↗
FAQ
How much does GPT-5.6 Terra cost?›
$2 per 1M input tokens and $12 per 1M output tokens; cached input $0.20 per 1M. A typical benchmark task costs about $0.14 at low effort.
Is GPT-5.6 Terra free to use?›
There is no free API; the cheapest paid price is $2 per 1M input tokens.
How good is GPT-5.6 Terra, and what is it best at?›
#84 of 334 in Chat & Knowledge, #51 of 132 in Coding, #48 of 133 in Agents & Tool Use, #46 of 195 in Writing & Language, #41 of 124 in Vision & Documents.
Is GPT-5.6 Terra better than GPT-6.1 Sol?›
On MLCR-AA, GPT-5.6 Terra scores 31.7 vs 33.9 — lower. It is 80% cheaper per task.
How can I use GPT-5.6 Terra?›
Through the API of Amazon Bedrock, Azure, OpenAI.
What is the context window of GPT-5.6 Terra?›
1.05M tokens, with up to 128K output tokens.
When was GPT-5.6 Terra released? Is there a newer version?›
Released 2026-07-09. It is the current version in its line.
Is GPT-5.6 Terra open source?›
No, GPT-5.6 Terra is a closed model available through an API. The closest open-weights option here is GLM 5.3 Flash.
Can GPT-5.6 Terra read images?›
It accepts text and images, PDF files as input.
What is GPT-5.6 Terra?›
GPT-5.6 Terra is a closed language model from OpenAI, released Jul 2026, the successor to GPT-3.5 Turbo.
What are the best alternatives to GPT-5.6 Terra?›
Muse Glimmer 30B (cheaper), GPT-5.6 Luna (better), GLM 5.3 Flash (open weights).