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OpenAI GPT-5.6 Terra: API pricing 2026

Balanced mid-tier of the GPT-5.6 family and the direct successor to the prior GPT-5.4 value tier. Half the flagship's output price makes it a strong cost-per-quality choice for production automation.

Input $/M tokens
$2.50
Output $/M tokens
$15.00
Cost / task
$0.0225
3k in + 1k out
Tier
mid
OpenAI

Cost at common task volumes

1,000 tasks / yr$22.50
10,000 tasks / yr$225
100,000 tasks / yr$2,250
1,000,000 tasks / yr$22,500

Token shape: 3,000 input + 1,000 output per task. No prompt caching. Real cost varies with your actual prompt shape.

Source

↗ https://openai.com/api/pricing

Verified 2026-07-17.

Compare with other LLMs
Claude Opus 4.8$0.0400Claude Sonnet 4.6$0.0240Claude Haiku 4.5$0.0080OpenAI GPT-5.6 Sol$0.0450OpenAI GPT-5.6 Luna$0.0090Gemini 2.5 Flash$0.0034Gemini 2.5 Flash-Lite$0.0007Grok 4.3$0.0063