AI Index

GPT-5.6 Terra

Language OpenAI Verified Released Jul 9, 2026
  • In TextImage Out Text
  • Reasoning· none, low, medium, high, xhigh, max
  • Reasoning can be off
  • Tool use
  • Structured output

Prices

3 offerings · prices as listed
OpenAI API Official Global · USD gpt-5.6-terra
Conditions/ 1M tokensInputCache readCache writeOutput
30-minute cache12-hour cache
Standard $2.00$0.20$2.50$5.00$12.00
Prompts over 272K tokens $4.00$0.40$5.00$10.00$18.00
Flex tier $1.00$0.10$1.25$2.50$6.00
Fast tier $4.00$0.40$5.00$10.00$24.00
Batch $1.00$0.10$1.25$2.50$6.00
Prompts over 272K tokensFlex tier $2.00$0.20$2.50$5.00$9.00
Prompts over 272K tokensFast tier $8.00$0.80$10.00$20.00$36.00
Prompts over 272K tokensBatch $2.00$0.20$2.50$5.00$9.00

Prices from OpenAI API pricing (checked Nov 9, 2026)

Standard: the price a request with no conditions pays (the headline price elsewhere on the site).

Details

Max input
922K
Knowledge cutoff
Feb 2026
Open weights
—
Family
gpt-terra
Model ID

Not stated on OpenAI’s pages: max thinking budget, aliases.

Cited scores

From third-party leaderboards, not measured by us
  • Epoch Capabilities Index 160.9

    #14 of 118 listed models · CI 158.7–163.4

  • LMArena Text 1,468

    #34 of 163 listed models · xhigh effort · CI 1,464–1,472 · 48,861 votes

  • Epoch AI · Chess Puzzles 47%

    #22 of 85 listed models · max effort · ±5.02

    Also listed: low effort 27% · reasoning off 5%

  • Epoch AI · FrontierMath Tier 4 v2 70.7%

    #15 of 65 listed models · max effort · ±7.19

  • Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Oct 28 – Nov 5, 2026
  • LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Nov 8, 2026
  • EQ-Bench by Samuel J. Paech (eqbench.com; EQ-bench/EQ-bench-site on GitHub), MIT License. · License · as of Oct 24 – 28, 2026
  • LiveBench (White et al.), release 2026-06-25, livebench.ai, licensed CC BY-SA 4.0. This board, adapted from it, is shared under CC BY-SA 4.0. · License · as of Jun 25, 2026
  • Terminal-Bench 4.0 leaderboard (Marten, Shaw et al., Terminal-Bench; harbor-framework/terminal-bench on GitHub), licensed Apache-2.0. · License · as of Sep 29, 2026
  • changes we made

Provider-reported scores

Published by OpenAI, under the conditions it states
BenchmarkSettingScore
SWE-bench Pro—63.4%
DeepSWE 1.1—69.6%
Terminal-Bench 2.1single agent87.4%
OSWorld 2.0set and scoring not stated50.2%
BrowseCompsingle agent87.5%
GPQA Diamond—92.9%
MMMU-Prono tools80.7%
with tools82%
MRCR v28-needle, 256K–512K89.6%
8-needle, 512K–1M72.5%

Included in coding plans

  • GitHub Copilot Pro $10.00 / month
    1,500 credits per month
    Variable additional usage on top of your base. Flex allotments may change over time.
    15 USD of usage per month
  • GitHub Copilot Pro+ $39.00 / month
    7,000 credits per month
    Variable additional usage on top of your base. Flex allotments may change over time.
    70 USD of usage per month
  • GitHub Copilot Max $100.00 / month
    20,000 credits per month
    Variable additional usage on top of your base. Flex allotments may change over time.
  • GitHub Copilot Business $19.00 / month
    1,900 credits per month
  • GitHub Copilot Enterprise $39.00 / month
    3,900 credits per month
  • Kiro Pro $20.00 / month
    1,000 credits per month
  • Kiro Pro+ $40.00 / month
    2,000 credits per month
  • Kiro Pro Max $100.00 / month
    5,000 credits per month
  • Kiro Power $200.00 / month
    10,000 credits per month

All coding plans →

Changes

All changes →
  1. 4 prices dropped on OpenAI API Input (Prompts over 272K tokens, Fast tier) $8.00 · Cache read (Prompts over 272K tokens, Fast tier) $0.80 · Cache write (Prompts over 272K tokens, Fast tier) $10.00 · Output (Prompts over 272K tokens, Fast tier) $36.00

Sources

OpenAI’s official policies: data use, privacy, terms →

OpenAI · United States · openai.com

Snapshots, the same family and other models from this provider