GPT-5.6 Terra pricing & benchmarks
GPT-5.6 Terra is available from OpenAI at $1.00 per million input tokens and $6.00 per million output tokens ($2.25 blended at 3:1). It accepts up to 1,050,000 tokens of context. GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Pricing
Per million tokens · OpenRouter
Input$1.00
Output$6.00
Blended (3:1)$2.25
Specification
openai/gpt-5.6-terra
Context window1.1M
Max output128K
ReleasedJul 2026
LicenceProprietary
Modalitiesin:text, in:image, in:file, out:text
Benchmarks
Independently run — not vendor self-reports. Every score links its source.
| Benchmark | Score | Config | Run | Source |
|---|---|---|---|---|
| GPQA Diamond | 93.3% ±1.5 | max effort | 2026-07-09 | Independently run · Epoch AI |
| FrontierMath T1–3 | 86.0% ±2.1 | max effort | 2026-07-09 | Independently run · Epoch AI |
| FrontierMath T4 | 70.7% ±7.2 | max effort | 2026-07-09 | Independently run · Epoch AI |
| SimpleQA Verified | 43.1% ±1.6 | max effort | 2026-07-09 | Independently run · Epoch AI |
| OTIS Mock AIME | 99.7% ±0.3 | max effort | 2026-07-09 | Independently run · Epoch AI |
Scores published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0.
Where to run GPT-5.6 Terra
6 options across 3 providers · 5.5× between cheapest and dearest. Blended at 3:1. ⚠ marks an option serving less context than the best available, or re-pricing above a prompt-length threshold. Bracketed labels are the provider's own service tier or region.
| Host | Blended $/1M | In / Out | Context | Uptime 24h |
|---|---|---|---|---|
| OpenAI (flex) ⚠ re-prices above 272K prompt tokens ($1.00/$4.50) |
$1.13 | $0.500 / $3.00 | 1.1M | 99.4% |
| OpenAI ⚠ re-prices above 272K prompt tokens ($2.00/$9.00) |
$2.25 | $1.00 / $6.00 | 1.1M | 99.4% |
| OpenAI (priority) | $4.50 | $2.00 / $12.00 | 1.1M | 99.4% |
| Amazon Bedrock (us-east-1) ⚠ re-prices above 272K prompt tokens ($4.40/$19.80) |
$4.95 | $2.20 / $13.20 | 1.1M | — |
| Azure ⚠ re-prices above 272K prompt tokens ($5.00/$22.50) |
$5.63 | $2.50 / $15.00 | 1.1M | 100.0% |
| Azure (eu) ⚠ re-prices above 272K prompt tokens ($5.50/$24.75) |
$6.19 | $2.75 / $16.50 | 1.1M | 100.0% |
Host prices and uptime from OpenRouter, synced 2026-08-08.
Compare GPT-5.6 Terra
FAQ
How much does GPT-5.6 Terra cost?
GPT-5.6 Terra costs $1.00 per million input tokens and $6.00 per million output tokens on OpenRouter. At a 3:1 input:output mix that blends to $2.25 per million tokens.
What is GPT-5.6 Terra's context window?
GPT-5.6 Terra accepts up to 1,050,000 tokens of context, and can generate up to 128,000 output tokens.
How good is GPT-5.6 Terra on benchmarks?
GPT-5.6 Terra scores 93.3% on GPQA Diamond, independently run and published by Epoch AI. 5 benchmark results are listed on this page, each with its run date and source.