GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperGPT-6.1 Solmax+23%-48%$0.72Remove unsupported parameters+5
OpenMiMo v2.6 Prothinking+15%-90%$0.13Context: 1.05M → 1M+4Lower effortSame modelxhigh-2%-55%$0.63CheaperGPT-6 Astralow+15%-42%$0.82Monitoring can return HTTP 403+2
CheaperClaude Opus 5.5low+13%-61%$0.55Context: 1.05M → 1M+6GPT-6.1 Solmax+23%-48%$0.72Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen+15%-90%$0.13Context: 1.05M → 1M+4GPT-6 Astralow+15%-42%$0.82Monitoring can return HTTP 403+2Claude Opus 5.5low+13%-61%$0.55Context: 1.05M → 1M+6
MiniMax M3.1 Flashthinking+12%-84%$0.22Context: 1.05M → 1M+1GPT-6.1 Sollow+10%-91%$0.13Remove unsupported parameters+5MiMo v2.6 ProthinkingOpen+15%-90%$0.13Context: 1.05M → 1M+4MiniMax M3.1 Flashthinking+12%-84%$0.22Context: 1.05M → 1M+1GPT-6 Solxhigh+8%-63%$0.52Claude Opus 5.5low+13%-61%$0.55Context: 1.05M → 1M+6MiMo v2.6 ProthinkingOpen+15%-90%$0.13Context: 1.05M → 1M+4
Kimi K3maxOpen+9%+43%$2.00Context: 1.05M → 1M+4
Step 5 PreviewthinkingOpen+8%-27%$1.03Context: 1.05M → 1M+4
Muse Spark OpenxhighOpensame-40%$0.84Context: 1.05M → 1M+2
DeepSeek V4.1 Flash 1017maxOpensame-81%$0.26Context: 1.05M → 1M+5GPT-6 Astramax+27%+133%$3.26Monitoring can return HTTP 403+2GPT-6.1 Solmax+23%-48%$0.72Remove unsupported parameters+5GPT-5.6 Solmax+15%+42%$1.99GPT-6 Solmax+12%-25%$1.04GPT-5.3 Codexxhighsame—$1.75 / $14Context: 1.05M → 400K+1GPT-5.5mediumsame-36%$0.90Prompts with >272K input tokensGPT-5.6 Lunamax-8%-87%$0.18GPT-6 Lunamax-10%-95%$0.068Function calling only with none · Chat Completions+3All 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 $1.40 at max 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?›
#32 of 334 in Chat & Knowledge, #15 of 132 in Coding, #20 of 133 in Agents & Tool Use, #46 of 195 in Writing & Language, #14 of 124 in Vision & Documents. Strongest at: Coding, Agents & work tasks, Tool calling, Reasoning, Science, Long context, Knowledge, Instructions, Vision.
Is GPT-5.6 Terra better than Qwen3.8 Max (0902)?›
On Humanity's Last Exam, GPT-5.6 Terra scores 42.9 vs 43.1 — about the same. It is 74% 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 MiMo v2.6 Pro.
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?›
GPT-6.1 Sol (cheaper), MiMo v2.6 Pro (open weights).