GPT-5.6 Terra
GPT-5.6 TerraAlternatives?
CheaperGemini 3.8 Flashlow+11%-67%*$0.75 / $3.75Context: 1.05M → 1M+2BetterGPT-6 Lunaxhigh+5%-71%$0.042Function calling only with none · Chat Completions+3
OpenMuse Spark Openxhigh+6%+484%$0.84Context: 1.05M → 1M+2Lower effortSame modelnon-thinking-12%-3%$0.14CheaperGPT-6.1 Sollow+9%-9%$0.13Remove unsupported parameters+5Gemini 3.8 Flashlow+11%-67%*$0.75 / $3.75Context: 1.05M → 1M+2GPT-6.1 Sollow+9%-9%$0.13Remove unsupported parameters+5Muse Sparkthinking+6%-56%$1.25 / $4.25Context: 1.05M → 1M+2GPT-6 Sollow+5%-8%$0.13Gemini 3 Flash Previewthinking+5%-75%$0.50 / $3Context: 1.05M → 1MGPT-6 Lunaxhigh+5%-71%$0.042Function calling only with none · Chat Completions+3GPT-5.6 Lunaxhigh+3%-41%$0.085GPT-6.1 Sollow+9%-9%$0.13Remove unsupported parameters+5GPT-6 Sollow+5%-8%$0.13Gemini 3.5 Flash Litehigh+4%+33%$0.19Context: 1.05M → 1MMuse Spark OpenxhighOpen+6%+484%$0.84Context: 1.05M → 1M+2
DeepSeek V4.1 Flash 1017maxOpen+6%+81%$0.26Context: 1.05M → 1M+5
Kimi K3maxOpen+6%+1,285%$2.00Context: 1.05M → 1M+4
Qwen3.8 FlashthinkingOpen+5%+158%$0.37Context: 1.05M → 262K+6Kimi K2.6thinkingOpen+4%+454%$0.80Context: 1.05M → 256KGPT-6 Astralow+11%+466%$0.82Monitoring can return HTTP 403+2GPT-6.1 Sollow+9%-9%$0.13Remove unsupported parameters+5GPT-5.6 Sollow+6%+80%$0.26GPT-6 Sollow+5%-8%$0.13GPT-5.5low+4%—$5 / $30Prompts with >272K input tokensGPT-5.3 Codexxhigh+3%—$1.75 / $14Context: 1.05M → 400K+1GPT-5.4low+2%—$2.50 / $15GPT-6 Lunalowsame-97%$0.005Function calling only with none · Chat Completions+3All OpenAI models →Watch 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 Muse Spark Open?›
On MMMU-Pro (vision), GPT-5.6 Terra scores 80.7 vs 80.9 — about the same. It is 83% 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 Muse Spark Open.
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?›
Gemini 3.8 Flash (cheaper), GPT-6 Luna (better), Muse Spark Open (open weights).