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#79

GPT-5.6 Terra

OpenAI Release: 2026-07-09 Tested on: 2026-10-01 01:55 openai/gpt-5.6-terra::high
~1T total (~60B active)MoEClosedEstimated
(high) (medium) (low) (none)

Summary

GPT-5.6 Terra scores 8.3 on AI BENCHY and ranks #79. It has 10.0 reliability, a 69.6% pass rate, $0.698 total cost, and 13.62s average response time.

What makes GPT-5.6 Terra unique: It stands out most in Domain specific, where it ranks #4, while Anti-AI Tricks is its weakest area at #14. It is notably fast compared with similar models.

Model facts

Researched on 2026-08-12

Estimated
Parameters
~1T total (~60B active)
Architecture
MoE
Availability
Closed
License
-

Best estimate from public evidence; the vendor did not disclose every value. Vendor does not disclose the architecture or count.

Parameter source Availability source

Score

8.3

Consistency

9.4

Reliability

10.0

Total Cost (Current Price)

$0.698 ↓ -46.4%

Tested at: $1.302

Total Output Tokens

60,065

Total Input Tokens

197,239

Input Price

$2.000 / 1M

Output Price

$12.000 / 1M

Cache Read Price

$0.200 / 1M

Cache Write Price

$2.500 / 1M

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Tests Correct

Wrong Tests: 8

Attempt pass rate: 69.6%

Flaky tests

2

Flaky tests had mixed outcomes across runs (at least one pass and one fail).

Response Time (avg)

13.62s

Response Time (max): 91.49s

Response Time (total): 313.21s

Wrong answer: 7 Invalid tool call: 1

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#79 GPT-5.6 Terra

high
Cost
$0.055
Time
30.2s
Tokens
3,748 tok

Run history

Tested on Score Reliability Tests Correct Total Cost Compare
2026-10-01 01:55 Re-test 8.3 10.0 $0.698 ↓ Current run
2026-07-16 22:40 New test added 8.0 10.0 $1.055 Compare
2026-07-09 21:31 Initial run 8.2 10.0 $0.852 Compare

This run used a different benchmark suite. Keep suite changes in mind when reading historical movement.

Price History

Historical pricing data for this model from OpenRouter.

Date Input Price Output Price Cache Read Price Cache Write Price
2026-07-09 21:33 $2.500 / 1M $15.000 / 1M N/A N/A
2026-07-28 08:40 $1.250 / 1M $7.500 / 1M N/A N/A
2026-07-31 10:14 $1.001 / 1M $6.000 / 1M N/A N/A
2026-08-14 12:51 $1.000 / 1M $6.000 / 1M N/A N/A
2026-10-01 18:33 $2.000 / 1M $12.000 / 1M $0.200 / 1M $2.500 / 1M

Charts

Choose the first model, then click a second model to open a side-by-side page.

Total Output Tokens

Score vs Total Output Tokens

Quick Compare

GPT-5.6 TerrahighvsGLM 5.2highGPT-5.6 TerrahighvsClaude Haiku 5.5highGPT-5.6 TerrahighvsDeepSeek V4 Flash 0731highGPT-5.6 TerrahighvsGemini 3.5 FlashhighGPT-5.6 TerrahighvsMuse Spark 1.1highGPT-5.6 TerrahighvsKimi K3maxGPT-5.6 TerrahighvsInklinghighFree AvailableGPT-5.6 TerrahighvsGPT-6 LunamediumGPT-5.6 TerrahighvsGemini 3.1 Pro PreviewmediumGPT-5.6 TerrahighvsClaude Opus 4.8medium

Category Breakdown

Category Score Consistency Tests Correct
Agentic 10.0 10.0
Anti-AI Tricks 8.3 10.0
Coding 7.6 7.2
Combined 8.7 6.9
Data parsing and extraction 10.0 10.0
Domain specific 5.3 10.0
General Intelligence 5.1 10.0
Instructions following 10.0 10.0
Puzzle Solving 7.7 10.0
Tool Calling 10.0 10.0
Trivia 3.0 10.0

Compared models