OpenAI
GPT-5.6 Terra
Balanced everyday member of the GPT-5.6 family, tuned for cost-aware agents.
Our editorial assessment, based on the public sources listed below. Last reviewed .
- Overall rank
- #19
- Tier
- A
- Score
- 84.8
- Main category
- Chat
Strengths
- Agents built on the previous generation often perform comparably at lower cost
- Noticeably more token-efficient than the prior flagship on long tasks
- Shares the GPT-5.6 family tooling and agent features
Considerations
- Sol remains the stronger choice for the hardest long-horizon problems
- Launched very recently, so independent evaluations are limited
- Pricing sits above the cost-optimised Luna tier
Price
API $2 input / $12 output per 1M tokens ($0.20 cached input)
Shown for reference — price is not part of the score.
Score breakdown
- Performance
- 84.0
- 55% of score
- Reputation
- 88.0
- 35% of score
- Recency
- 78.0
- 10% of score
The overall score combines these sub-scores using the weights shown. How we score →
Verification status
Each field carries its own re-verification date. Amber means older than 90 days — treat those figures as stale until re-checked.
- Pricing
- Benchmark
- Reputation
- Feature list
Checked against the sources listed below.
Sources
- Artificial Analysis — GPT-5.6 Terra (opens in a new tab)Accessed:
- OpenAI API — Models reference (gpt-5.6-terra, $2/$12 per MTok, 1.05M context) (opens in a new tab)Accessed:
- OpenAI API — Models and providers (gpt-5.6-terra) (opens in a new tab)Accessed:
- Artificial Analysis — LLM Leaderboard (opens in a new tab)Accessed:
- OpenAI — Introducing GPT-5.6 (opens in a new tab)Accessed:
Show 8 more sources
- BenchLM.ai Frontier AI Models (Aug 2026) (opens in a new tab)Accessed:
- Swfte AI Model Leaderboard (Sep 2026) (opens in a new tab)Accessed:
- Perplexity Agent API Changelog (opens in a new tab)Accessed:
- Gemini 3.7 Flash — Google DeepMind (opens in a new tab)Accessed:
- OpenAI Model Release Notes (opens in a new tab)Accessed:
- Perplexity Agent API Models — OpenAI (opens in a new tab)Accessed:
- Entelligence AI — Best AI Models of July 2026 (opens in a new tab)Accessed:
- Best AI Models July 2026: GPT-5.6 & Claude 5 (opens in a new tab)Accessed:
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