GPT-5.6 Terra
GPT-5.6's balanced everyday tier GPT-5.5-competitive performance at roughly 2x lower cost than the Sol flagship. A general-purpose workhorse for production agents and coding with a 1.05M-token context window.
Specifications
| Lab | OpenAI |
|---|---|
| Context window | 1.1M tokens |
| Input price | $2.00/1M |
| Output price | $12.00/1M |
| Release | Jul 2026 |
Strengths
- GPT-5.5-competitive quality at ~2x lower cost than Sol
- 1.05M-token context at a mid-tier price
- Strong general-purpose coding and agentic baseline
- Replaces GPT-5.4 as the balanced default workhorse
Weaknesses
- Trails Sol on frontier and agentic benchmarks
- No Ultra multi-agent mode
Best for
- Production agents and everyday coding
- Cost-aware general-purpose use
- Mid-volume API traffic
In Depth: GPT-5.6 Terra
Summary
GPT-5.6 Terra is an AI model from OpenAI.
Released in Jul 2026. It takes text input and produces text output, with a context window of 1.1M tokens. Input pricing is $2.00 per 1M tokens and output is $12.00 per 1M tokens on OpenRouter.