GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperGPT-6.1 Solmax×4.2-48%$0.72Remove unsupported parameters+5BetterGPT-6.1 Terramedium+79%-93%$0.095
OpenDeepSeek V4.1 Flash 1017maxsame-81%$0.26Context: 1.05M → 1M+5
CheaperClaude Sonnet 5.5high×2.5-37%$0.88Context: 1.05M → 1M+6CheaperGPT-6 Solmax×2.2-25%$1.04GPT-6.1 Solmax×4.2-48%$0.72Remove unsupported parameters+5GPT-6.1 Terramax×4.2-71%$0.40Claude Sonnet 5.5high×2.5-37%$0.88Context: 1.05M → 1M+6GPT-6 Solmax×2.2-25%$1.04Claude Opus 5.5low+76%-61%$0.55Context: 1.05M → 1M+6GPT-6.1 Terramedium+79%-93%$0.095Claude Haiku 5.5xhigh+31%-91%$0.12Context: 1.05M → 1M+6GPT-6.1 Solmedium×2.7-85%$0.21Remove unsupported parameters+5GPT-6 Solhigh+24%-73%$0.37Claude Sonnet 5.5medium+17%-65%$0.48Context: 1.05M → 1M+6DeepSeek V4.1 Flash 1017maxOpensame-81%$0.26Context: 1.05M → 1M+5
GLM 5.3maxOpen-31%+43%$2.01Context: 1.05M → 1M+5
Kimi K3maxOpen-41%+43%$2.00Context: 1.05M → 1M+4DeepSeek V4 Pro 0813maxOpen-59%-52%$0.67Context: 1.05M → 1M+6
MiMo v2.6 ProthinkingOpen-59%-90%$0.13Context: 1.05M → 1M+4GPT-6 Astramax×4.6+133%$3.26Monitoring can return HTTP 403+2GPT-6.1 Solmax×4.2-48%$0.72Remove unsupported parameters+5GPT-6.1 Terramax×4.2-71%$0.40GPT-6 Solmax×2.2-25%$1.04GPT-5.6 Solmax+62%+42%$1.99GPT-6 Lunamax-38%-95%$0.068Function calling only with none · Chat Completions+3GPT-5.6 Lunamax-76%-87%$0.18GPT OSS 120BhighOpen-100%-92%$0.11Context: 1.05M → 131K+1All 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?›
#35 of 360 in Chat & Knowledge, #17 of 137 in Coding, #23 of 138 in Agents & Tool Use, #52 of 197 in Writing & Language, #16 of 132 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 Terminal-Bench Science 0.1, GPT-5.6 Terra scores 13.8 vs 20 — lower. 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 DeepSeek V4.1 Flash 1017.
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), GPT-6.1 Terra (better), DeepSeek V4.1 Flash 1017 (open weights).