GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperMiMo v2.6 FlashthinkingOpen×2.2-57%$0.062Context: 1.05M → 1M+4BetterGPT-6 Lunamedium+39%-88%$0.017Function calling only with none · Chat Completions+3
OpenDeepSeek V4.1 Flash 1017max×2.3+81%$0.26Context: 1.05M → 1M+5Lower effortSame modelnon-thinking-57%-3%$0.14CheaperMiMo v2.6 ProthinkingOpen×2-8%$0.13Context: 1.05M → 1M+4MiMo v2.6 FlashthinkingOpen×2.2-57%$0.062Context: 1.05M → 1M+4MiMo v2.6 ProthinkingOpen×2-8%$0.13Context: 1.05M → 1M+4GPT-6 Sollow+85%-8%$0.13GPT-6 Lunamax+83%-53%$0.068Function calling only with none · Chat Completions+3GPT-6.1 Sollow+81%-9%$0.13Remove unsupported parameters+5GPT-6 Lunamedium+39%-88%$0.017Function calling only with none · Chat Completions+3GPT-5.6 Lunahigh+22%-70%$0.044MiMo v2.6 FlashthinkingOpen×2.2-57%$0.062Context: 1.05M → 1M+4
Claude Haiku 5.5high+16%-45%$0.079Context: 1.05M → 1M+6GPT-6.1 Sollow+81%-9%$0.13Remove unsupported parameters+5DeepSeek V4.1 Flash 1017maxOpen×2.3+81%$0.26Context: 1.05M → 1M+5MiMo v2.6 FlashthinkingOpen×2.2-57%$0.062Context: 1.05M → 1M+4
GLM 5.3maxOpen×2.1+1,288%$2.01Context: 1.05M → 1M+5
Ling 3.1 FlashOpen×2.1+592%$1.00Context: 1.05M → 1M+1GLM 5.3 FlashmaxOpen×2.1+96%$0.28Context: 1.05M → 1M+5GPT-6 Astralow×2+466%$0.82Monitoring can return HTTP 403+2GPT-6 Sollow+85%-8%$0.13GPT-6.1 Sollow+81%-9%$0.13Remove unsupported parameters+5GPT-5.6 Sollow+41%+80%$0.26GPT-5.5medium+38%+524%$0.90Prompts with >272K input tokensGPT-5.5 Instant (June 2026)+25%+379%$0.69Context: 1.05M → 400KGPT-5.4 Minixhigh-10%+210%$0.45Context: 1.05M → 400KGPT-6 Lunalow-59%-97%$0.005Function calling only with none · Chat Completions+3All OpenAI models →Benchmarks
in Agents & Tool UseWatch 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 Mistral Large 4?›
On AutomationBench-AA, GPT-5.6 Terra scores 59.6 vs 59.9 — about the same. It is 87% 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 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?›
MiMo v2.6 Flash (cheaper), GPT-6 Luna (better), DeepSeek V4.1 Flash 1017 (open weights).