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GPT-5.6 Terra

OpenAIProprietaryReasoningVerifiedReleased Jul 9, 2026Input: file, image, text
Compare with Claude Opus 4.8Source scores ↗OpenRouter ↗
Overall score
70.2
Rank 15 of 222 · 66.5–73.8
Context window
1.05M
1,050,000 tokens
Price per 1M tokens
$2.00 in · $12.00 out
✓ Verified on OpenAI's pricing page
Blended price
$4.50
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Math90.1
  2. 2Instruction following#3987.1
  3. 3Multimodal#1184.5
  4. 4Agentic & tool use#2776.0
  5. 5Knowledge#1873.7
  6. 6Reasoning#1969.1
  7. 7Coding#1564.3
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (31)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Agentic & tool use

Terminal-Bench 2.187.4#12 of 68
BrowseComp87.5#11 of 50
MazeBench6#11 of 42
CyberGym81.8#12 of 25
OSWorld 2.050.2#9 of 24
Toolathlon53.1#8 of 22
ApprenticeBench16#10 of 18
ExploitGym23.2#4 of 14
Terminal-Bench 3.020.8#6 of 13

Knowledge

GPQA92.9#8 of 117
HealthBench Professional57.7#13 of 16
HealthBench Hard32.7#6 of 12
LABBench281.2#6 of 7
HLE-Verified51.1#5 of 6

Coding

SWE-bench Pro63.4#16 of 69
DeepSWE69.6#19 of 50
VulcanBench v387.0#4 of 14
FrontierCode 1.1 Extended55.8#7 of 8

Multimodal

MMMU-Pro80.7#10 of 48
ParseBench68.39#17 of 37
ExtractBench (LlamaIndex)(lower is better)92.26#20 of 24
MMMU-Pro w/ Python82.0#5 of 9

Reasoning

ARC-AGI-283.9#14 of 41
ARC-AGI-196.50#8 of 36
ARC-AGI-30.8#11 of 22

Math

FrontierMath v2 (Tiers 1-3)84.900#13 of 64
FrontierMath v2 (Tier 4)68.300#13 of 51
FrontierMath (legacy)84.9#2 of 7

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
✓ Official (OpenAI)
checked Oct 17, 2026 · gpt-5.6-terra
$2.00$12.00$0.20
BenchLM list price$2.00$12.00$0.20
OpenRouter openai/gpt-5.6-terra$2.00$12.00$0.20

Standard tier, prompts under 272K tokens.

OpenAI's API pricing page lists GPT-5.6 Terra at $2.00 input / $0.20 cached input / $12.00 output per million tokens for short-context requests. Prompts above 272K input tokens use the published $4.00 input / $0.40 cached input / $18.00 output long-context tier; cache writes cost $2.50 per million tokens. Observed September 11, 2026; the $2.50 / $15.00 launch rate is retained in the price history.

Arena ratings

Human-preference ratings from LMArena. Best-rated variant shown.

Text(xhigh)1447#58 · 43.3K votes
WebDev (coding)(xHigh, Codex Harness)1522#54 · 13.9K votes
Vision(xHigh)1271#43 · 11.8K votes
Documents(xhigh)1472#13 · 5.8K votes

Speed

Measured by us through OpenRouter (median of trials).

Not measured yet.

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