GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperMiMo v2.6 ProthinkingOpen+11%-90%$0.13Context: 1.05M → 1M+4Lower effortSame modelhigh-5%-76%$0.34
CheaperStep 5 PreviewthinkingOpen+7%-27%$1.03Context: 1.05M → 1M+4
CheaperClaude Opus 5.5low+7%-61%$0.55Context: 1.05M → 1M+6
CheaperMuse Spark OpenxhighOpen+6%-40%$0.84Context: 1.05M → 1M+2MiMo v2.6 ProthinkingOpen+11%-90%$0.13Context: 1.05M → 1M+4Step 5 PreviewthinkingOpen+7%-27%$1.03Context: 1.05M → 1M+4Claude Opus 5.5low+7%-61%$0.55Context: 1.05M → 1M+6Muse Spark OpenxhighOpen+6%-40%$0.84Context: 1.05M → 1M+2GPT-5.6 Solhigh+5%-42%$0.81MiMo v2.6 ProthinkingOpen+11%-90%$0.13Context: 1.05M → 1M+4GPT-5.6 Solmedium+4%-64%$0.50Claude Opus 5.5low+7%-61%$0.55Context: 1.05M → 1M+6Muse Spark OpenxhighOpen+6%-40%$0.84Context: 1.05M → 1M+2Step 5 PreviewthinkingOpen+7%-27%$1.03Context: 1.05M → 1M+4MiMo v2.6 ProthinkingOpen+11%-90%$0.13Context: 1.05M → 1M+4
Kimi K3maxOpen+8%+43%$2.00Context: 1.05M → 1M+4
GLM 5.3maxOpen+7%+43%$2.01Context: 1.05M → 1M+5Step 5 PreviewthinkingOpen+7%-27%$1.03Context: 1.05M → 1M+4Muse Spark OpenxhighOpen+6%-40%$0.84Context: 1.05M → 1M+2GPT-6 Solmax+5%-25%$1.04GPT-5.6 Solmax+4%+42%$1.99GPT-6 Astramax+3%+133%$3.26Monitoring can return HTTP 403+2GPT-6.1 Terramaxsame-71%$0.40GPT-6 Lunamaxsame-95%$0.068Function calling only with none · Chat Completions+3GPT-5.5mediumsame-45%$0.77Prompts with >272K input tokensGPT-6.1 Solmaxsame-48%$0.72Remove unsupported parameters+5GPT-5.6 Lunamax-3%-87%$0.18All OpenAI models →History
2 versionsBenchmarks
in CodingWatch 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?›
#34 of 336 in Chat & Knowledge, #16 of 134 in Coding, #22 of 135 in Agents & Tool Use, #52 of 197 in Writing & Language, #15 of 125 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 Claude Haiku 5.5?›
On SciCode, GPT-5.6 Terra scores 55 vs 55 — about the same. It is 557% more expensive 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?›
MiMo v2.6 Pro (cheaper).