MDL
GPT-5.6 Terra
OpenAI
Verified against Artificial Analysis · Jul 27, 2026
Capability
90
percentile index
Price /M
$2.5 / $15
in / out
Context
1.1M
tokens
Avg score
66.2
7 benchmarks
AA Intelligence
51.6
index
Speed
120 tok/s
TTFT 7.7s
Released
Jul 9, 2026
About
GPT-5.6 Terra is a proprietary model in the GPT family from OpenAI. Benchmarked on 7 evals, averaging 66.2.
Benchmark scores · 7
avg 66.2 — higher is betterPerformance & price
Output speed120 tok/s
Latency (TTFT)7.7s
Price in / out$2.5 / $15 per 1M
Blended price$5.63 / 1M
Coding index70.6
Median across API providers, via Artificial Analysis. Blended = 3:1 input:output. For reasoning models, latency includes thinking time. Methodology →
History
full ledger →Capability over time
GPQA Diamondfirst seen at 90.8
15d ago
Humanity's Last Examfirst seen at 40
15d ago
SciCodefirst seen at 51.6
15d ago
IFBenchfirst seen at 66.3
15d ago
τ²-benchfirst seen at 80.4
15d ago
Terminal-Bench Hardfirst seen at 62.9
15d ago
Append-only ledger — every observed change to this model's numbers.
API providers
Artificial Analysis$15/M