#13OpenAI· released 2026-07-09

OpenAI: GPT-5.6 Terra.

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...

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Context
1.1M
Input $/1M
$2.50
Output $/1M
$15.00
Modality
file · image · text

Benchmarks

How these are aggregated →
Arena Elo
1507
LMArena — human blind votes
AA Index
60.0
Artificial Analysis composite
LiveBench
76.6
Contamination-resistant
GPQA
83.7%
Grad-level science reasoning
MMLU-Pro
82.4%
Broad knowledge
SWE-bench
66.5%
Real GitHub bugs (Verified)
Terminal-Bench
44.6%
Agentic shell tasks
ARC-AGI
14.9%
Abstract reasoning
Aider Polyglot
81.9%
Multi-language code editing
Speed
81 tok/s
Median output speed

Nearby on the leaderboard