GPT-5.6 TerravsGPT-5.5
Across 10 shared benchmarks, GPT-5.6 Terra leads overall: GPT-5.6 Terra wins 7, GPT-5.5 wins 3, with 0 ties and an average score difference of +3.40.
GPT-5.6 Terra
OpenAI · 2026-06-26 · Reasoning model
GPT-5.5
OpenAI · 2026-04-23 · Reasoning model
GPT-5.6 Terra7 wins(70%)(30%)3 winsGPT-5.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 10 shared benchmarks.
Coding and Software Engineer
GPT-5.6 Terra 3/3| Benchmark | GPT-5.6 Terra | GPT-5.5 | Diff |
|---|---|---|---|
| Text Arena (Coding) | 1,52216 / 35极高强度思考（无工具） | 1,50518 / 35极高强度思考（无工具） | +16.87 |
| WeirdML v2 | 78.2710 / 52Thinking High (With Tools) | 67.1522 / 52Normal (With Tools) | +11.12 |
| DeepSWE | 69.603 / 27极高强度思考（工具） | 677 / 27极高强度思考（工具） | +2.60 |
General Knowledge
GPT-5.6 Terra 2/3| Benchmark | GPT-5.6 Terra | GPT-5.5 | Diff |
|---|---|---|---|
| ARC-AGI | 96.502 / 68最高（无工具） | 955 / 68极高强度思考（无工具） | +1.50 |
| ARC-AGI-2 | 83.907 / 62最高（无工具） | 852 / 62Thinking High (No Tools) | -1.10 |
| ARC-AGI-3 | 0.802 / 9最高（无工具） | 05 / 9Thinking High (No Tools) | +0.80 |
Math and Reasoning
Even 2/2| Benchmark | GPT-5.6 Terra | GPT-5.5 | Diff |
|---|---|---|---|
| FrontierMath Tier 4 v2 | 70.736 / 34最高（无工具） | 72.505 / 34极高强度思考（无工具） | -1.77 |
| FrontierMath v2 | 85.964 / 34最高（无工具） | 85.266 / 34极高强度思考（无工具） | +0.70 |
AI Agent - Tool Usage
GPT-5.6 Terra 1/1| Benchmark | GPT-5.6 Terra | GPT-5.5 | Diff |
|---|---|---|---|
| Terminal-Bench 2.1 | 87.407 / 44最高（无工具） | 83.4013 / 44Thinking High (With Tools) | +4 |
General Evaluation
GPT-5.5 1/1| Benchmark | GPT-5.6 Terra | GPT-5.5 | Diff |
|---|---|---|---|
| GPQA Diamond | 93.3116 / 226最高（无工具） | 947 / 226极高强度思考（无工具） | -0.69 |
Specs
| Field | GPT-5.6 Terra | GPT-5.5 |
|---|---|---|
| Publisher | OpenAI | OpenAI |
| Release date | 2026-06-26 | 2026-04-23 |
| Model type | Reasoning model | Reasoning model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1.05M | 1000K |
| Max output | 128K | 128K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | GPT-5.6 Terra | GPT-5.5 |
|---|---|---|
| Text input | $2.5 / 1M tokens | $0.5 / 1M tokens |
| Text output | $15 / 1M tokens | $30 / 1M tokens |
| Cache read | $0.25 / 1M tokens | $0.5 / 1M tokens |
| Cache write | $3.125 / 1M tokens | $6.25 / 1M tokens |
Summary
- GPT-5.6 Terraleads in:Coding and Software Engineer (3/3), General Knowledge (2/3), AI Agent - Tool Usage (1/1)
- GPT-5.5leads in:General Evaluation (1/1)
- Tied in:Math and Reasoning
On average across the 10 shared benchmarks, GPT-5.6 Terra scores 3.40 higher.
Largest single-benchmark gap: Text Arena (Coding) — GPT-5.6 Terra 1,522 vs GPT-5.5 1,505 (+16.87).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.