GPT 5.6 Terra

Every figure OnlySOTA holds for this model, one source at a time. Nothing on this page is averaged across sources.

KILLED

Identity

Developer

OpenAI

Family

GPT → GPT 5.6

Weights

closed

Released

2026-07-09

Blended Price, USD per 1M tokens (3:1 input:output)

$4.50

Sources

6 sources · 16 entries · 14 configs

Published upstream as

GPT-5.6 Terragpt-5-6-terraGPT 5.6 Terragpt-5.6-terra

Where it places

• Artificial Analysis LLM Leaderboard Artificial Analysis Intelligence Index 56.6
• Arena — Agent Overall #23 0.030
• Artificial Analysis Coding Agents Artificial Analysis Coding Agent Index 0.604
• Arena — Code Overall #27 1520
• Arena — Text Overall (style control) #42 1466
• Arena — Vision Overall (style control) #32 1266

Effort ladder

• Artificial Analysis LLM Leaderboard max wins

  1. low 41.3
  2. medium 46.8
  3. high 50.1
  4. xhigh 52.8
  5. max 56.6

• Arena — Agent agent only xhigh ran

  1. xhigh 0.030

• Artificial Analysis Coding Agents Codex max wins

  1. low 0.386
  2. medium 0.480
  3. high 0.546
  4. xhigh 0.560
  5. max 0.604

• Arena — Code codex-harness only xhigh ran

  1. xhigh 1520

• Arena — Text only xhigh ran

  1. xhigh 1466

• Arena — Vision only xhigh ran

  1. xhigh 1266