GPT-5.6 Terra
by OpenAI
Today's price · per 1M tokens
Input
$2.00
per 1M tokens
Output
$12.00
per 1M tokens
Blended
$7.00
avg of input & output $/1M
Cached input
$0.200
10% of input — prompt caching
Source: official OpenAI pricing · read Aug 1, 2026
MODELPRICEWATCH.COM · 2026-08-01
Overview
Balanced GPT-5.6 tier trading a step of intelligence for lower cost — the mid capability tier in the Sol/Terra/Luna scheme. 1.05M context, 128K max output, text + image input. $2/$12 per 1M tokens (cached input $0.20).
Capabilities
struck through = not supportedInput 2/5
Text ✓
Image ✓
Audio
Video
PDF
Output 1/5
Text ✓
Image
Audio
Video
Embedding
Features 4/9
Prompt caching ✓
Reasoning ✓
Coding
Fast inference
Long context ✓
Open weights
Multimodal ✓
Web search
Realtime
Benchmark performance
accuracy % · higher is betterAvg benchmark score87.7%
Perf per $/Mtok10
GPQA Diamond
92.9%
Terminal-Bench 2.1
82.5%
Independent composite scores
- AA Intelligence Index: 55 (Artificial Analysis composite across reasoning, knowledge and coding evals)
- AA Agentic Index: 47.4 (Tool use, planning, autonomy)
- AA-Omniscience Index: -0.2 (−100–100)
- GDPval-AA v2: 1582.7 ELO (Real-world work tasks, human baseline = 1000)
How it stacks up
- Ranks #4 of 68 benchmarked models by average score
- Ranks #15 of 133 comparably-measured models by percentile score, across 6 independent measurements
- Ranks #97 of 133 comparably-tested models by normalized performance per dollar
- Strongest at GPQA Diamond — 92.9%, #11 of 57
135.5 tokens/sec output
Source: Vellum LLM Leaderboard · updated Aug 1, 2026 · See full rankings →
Specifications
- Provider
- OpenAI
- Context window
- 1M tokens
- Modality
- text, image
- Parameters
- Proprietary
- Open source
- No — proprietary
- Released
- Jul 9, 2026
- Status
- Current
- Last updated
- Aug 1, 2026
- Tags
Availability verified: Aug 1, 2026 — listed on OpenAI's own page