GPT-5.6 SolvsGPT-5.5
Across 8 shared benchmarks, GPT-5.6 Sol leads overall: GPT-5.6 Sol wins 7, GPT-5.5 wins 1, with 0 ties and an average score difference of +21.
GPT-5.6 Sol
OpenAI · 2026-06-26 · Reasoning model
GPT-5.5
OpenAI · 2026-04-23 · Reasoning model
GPT-5.6 Sol7 wins(88%)(13%)1 winGPT-5.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 8 shared benchmarks.
Coding and Software Engineer
GPT-5.6 Sol 4/4| Benchmark | GPT-5.6 Sol | GPT-5.5 | Diff |
|---|---|---|---|
| Text Arena (Coding) | 1,6204 / 35极高强度思考（无工具） | 1,50518 / 35极高强度思考（无工具） | +115.53 |
| WeirdML v2 | 88.762 / 52Thinking High (With Tools) | 67.1522 / 52Normal (With Tools) | +21.61 |
| SWE-Bench Pro - Public | 64.607 / 57极高强度思考（工具） | 58.6015 / 57Thinking High (With Tools) | +6 |
| DeepSWE | 72.701 / 27极高强度思考（工具） | 677 / 27极高强度思考（工具） | +5.70 |
Math and Reasoning
GPT-5.6 Sol 2/2| Benchmark | GPT-5.6 Sol | GPT-5.5 | Diff |
|---|---|---|---|
| FrontierMath Tier 4 v2 | 82.932 / 34最高（无工具） | 72.505 / 34极高强度思考（无工具） | +10.43 |
| FrontierMath v2 | 89.121 / 34最高（无工具） | 85.266 / 34极高强度思考（无工具） | +3.86 |
AI Agent - Tool Usage
GPT-5.6 Sol 1/1| Benchmark | GPT-5.6 Sol | GPT-5.5 | Diff |
|---|---|---|---|
| Terminal-Bench 2.1 | 88.801 / 44最高（无工具） | 83.4013 / 44Thinking High (With Tools) | +5.40 |
General Evaluation
GPT-5.5 1/1| Benchmark | GPT-5.6 Sol | GPT-5.5 | Diff |
|---|---|---|---|
| GPQA Diamond | 93.5014 / 226最高（无工具） | 947 / 226极高强度思考（无工具） | -0.51 |
Specs
| Field | GPT-5.6 Sol | 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 Sol | GPT-5.5 |
|---|---|---|
| Text input | $5 / 1M tokens | $0.5 / 1M tokens |
| Text output | $30 / 1M tokens | $30 / 1M tokens |
| Cache read | $0.5 / 1M tokens | $0.5 / 1M tokens |
| Cache write | $6.25 / 1M tokens | $6.25 / 1M tokens |
Summary
- GPT-5.6 Solleads in:Coding and Software Engineer (4/4), Math and Reasoning (2/2), AI Agent - Tool Usage (1/1)
- GPT-5.5leads in:General Evaluation (1/1)
On average across the 8 shared benchmarks, GPT-5.6 Sol scores 21 higher.
Largest single-benchmark gap: Text Arena (Coding) — GPT-5.6 Sol 1,620 vs GPT-5.5 1,505 (+115.53).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.