GPT-5.6 Terra
OpenAIUpdated August 2026. GPT-5.6 Terra by OpenAI: $2.00/M cache-miss input, $12.00/M output tokens. Cached input: $0.2/M. Explicit cache writes: $2.50/M. Long-context pricing above 272K input tokens: $4.00/M input, $18.00/M output. 1.1M context, 128K max output. Vision & Function Calling. Free calculator + compare 40+ models.
Input Price
$2.00
cache miss / 1M tokens
Cached Input
$0.2
per 1M tokens
Output Price
$12.00
per 1M tokens
Context Window
1.1M
tokens
Specifications
| Provider | OpenAI |
| Model ID | gpt-5.6-terra |
| Input Price | $2.00 / 1M cache-miss tokens |
| Cached Input Price | $0.2 / 1M tokens |
| Explicit Cache Write Price | $2.50 / 1M tokens |
| Output Price | $12.00 / 1M tokens |
| Long Context Threshold | 272K input tokens |
| Long Context Pricing | $4.00 / 1M cache-miss input, $0.4 / 1M cached input, $5.00 / 1M explicit cache writes, $18.00 / 1M output |
| Context Window | 1.1M tokens |
| Max Output | 128K tokens |
| Capabilities | textvisionfunction_callingstructured_output |
| Release Date | 2026-07-09 |
| Pricing Source | Official OpenAI pricing |
| Price Verified | 2026-08-01 · GPT-5.6 Terra and Luna prices reflect OpenAI's latest reductions. Sol pricing is unchanged. |
| Notes | Balanced GPT-5.6 production model at OpenAI's reduced August 2026 price. Explicit cache writes cost 1.25x uncached input; requests above 272K input tokens use long-context pricing. |
Monthly Cost Estimates
Estimated monthly costs based on different daily usage levels (assuming 50% input / 50% output split). Input estimates use cache-miss pricing, so cache-heavy workloads can be lower.
| Daily Tokens | Monthly Cost | Annual Cost |
|---|---|---|
| 10K | $2.10 | $25.20 |
| 50K | $10.50 | $126.00 |
| 100K | $21.00 | $252.00 |
| 500K | $105.00 | $1260.00 |
| 1.0M | $210.00 | $2520.00 |
About GPT-5.6 Terra
GPT-5.6 Terra is a large language model by OpenAI. It features a 1.1M token context window with up to 128K tokens of output per request. The model supports 4 capabilities: text, vision, function_calling, structured_output.
At $2.00 per million cache-miss input tokens and $12.00 per million output tokens, GPT-5.6 Terra is positioned as a mid-range option in the OpenAI lineup. Repeated prefix input can be charged at $0.2 per million cached tokens. Use our Token Counter to estimate how many tokens your prompts use, and our Pricing Calculator to compare costs across all models.
GPT-5.6 Terra Key Details
- Pricing: $2.00/M cache-miss input tokens, $0.2/M cached input tokens, $2.50/M explicit cache writes, $12.00/M output tokens
- Context window: 1.1M tokens — one of the largest available
- Max output: 128K tokens per response
- Capabilities: text, vision, function_calling, structured_output
- Highlights: Balanced GPT-5.6 production model at OpenAI's reduced August 2026 price. Explicit cache writes cost 1.25x uncached input; requests above 272K input tokens use long-context pricing.
- Released: 2026-07-09
Other OpenAI Models
Similar Price Range
Related Tools
FAQ
How much does GPT-5.6 Terra cost?
GPT-5.6 Terra costs $2.00 per million cache-miss input tokens and $12.00 per million output tokens. Cached input costs $0.2 per million tokens. For a typical workload of 100K input tokens/day and 50K output tokens/day, expect approximately $24.00/month before cache-hit savings.
What is GPT-5.6 Terra's context window?
GPT-5.6 Terra supports a context window of 1.1M tokens. This means your combined input prompt and output response can be up to 1.1M tokens. The maximum output per response is 128K tokens.
Is GPT-5.6 Terra good for my use case?
GPT-5.6 Terra supports text, vision, function_calling, structured_output. As a mid-range model, it balances capability and cost for most production use cases. Use our Pricing Calculator to compare with alternatives.