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Advancing the price-performance frontier with GPT-5.6
By making every layer more efficient, OpenAI is delivering stronger performance per dollar across more enterprise workloads.
OpenAI
GPT-5.6 Terra
GPT-5.6 model that balances intelligence and cost.
Specs
Model
- Family
- GPT-5
- Variant
- 5.6 Terra
- Weights
- Proprietary
Limits
- Context
- 1,050,000 tokens
- Max output
- 128,000 tokens
Modalities
- Input
- Text Image PDF
- Output
- Text
Pricing
- Input
- $2 / 1M
- Output
- $12 / 1M
- Cache read
- $0.2 / 1M
- Cache write
- $2.5 / 1M
Capabilities
- Reasoning
- Yes
- Reasoning control
- Effort levels
- Tool calling
- Yes
- Attachments
- Yes
Dates
- Released
- 9 Jul 2026
- Knowledge cutoff
- 16 Feb 2026
Articles
All articlesopenai.com
X
Getting the most out of GPT-5.6: Sol, Terra, and Luna
Your Codex subscription now comes with 3 main models, Sol, Terra, and Luna, each independently trained and served, with reasoning dials.
Cerebras@cerebras
OpenAI
GPT-5.6: Frontier intelligence that scales with your ambition
We’re launching the GPT‑5.6 family of models for general availability following our limited preview: our new flagship, Sol, alongside Terra, a balanced model for everyday work, and Luna, our most cost-efficient model.
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