GPT-5.6 Terra
OpenAI · Multimodal · Released Jul 2026
GPT-5.6 Terra is OpenAI's midrange model in the GPT-5.6 series, balancing general-purpose capability with reasonable latency and resource efficiency.
- Strengths
- Handles complex reasoning and multi-step tasks without the overhead of the flagship Sol series, while maintaining stronger capability than the lightweight Luna tier.
- Best for
- General-purpose work where you need solid reasoning capability but don't require the performance ceiling of the Sol series—content generation, analysis, customer-facing tasks, and development assistance.
- Limitations
- Falls short of the specialized reasoning strength offered by GPT-5.6 Sol, and offers less speed optimization than GPT-5.6 Luna; GPT-6 models released later in 2026 supersede this tier.
Input / 1M
$2.00
Output / 1M
$12.00
Cached input / 1M
$0.2
Context window
1.05M
Also billed
- Cache write
- $2.50 / 1M
Price history
Input (solid)Output (dashed)
Price change
- 30d
- in — out —
- 90d
- in decreased 20.0% out decreased 20.0%
- 1y
- in decreased 20.0% out decreased 20.0%
- Since launch
- in decreased 20.0% out decreased 20.0%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 17 Aug 2026 | $2.00 | $12.00 | $0.2 | Imported from OpenRouter | openrouter.ai |
| 30 Jul 2026 | $1.00 | $6.00 | $0.1 | Imported from OpenRouter | openrouter.ai |
| 27 Jul 2026 | $1.25 | $7.50 | $0.125 | Imported from OpenRouter | openrouter.ai |
| 10 Jul 2026 | $2.50 | $15.00 | $0.25 | Imported from OpenRouter | openrouter.ai |