GPT-5.6 Sol vs GPT-5.2-Codex
Detailed technical comparison between GPT-5.6 Sol (OpenAI) and GPT-5.2-Codex (OpenAI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
GPT-5.6 Sol
1,050,000 tokensTie
Equal CapabilityTie
Equal SpeedGPT-5.2-Codex
$1.75 / MTokGPT-5.6 Sol
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...
GPT-5.2-Codex
GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Technical Specifications
🏆 = Superior Spec| Specification | GPT-5.6 Sol | GPT-5.2-Codex |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 1,050,000 tokens🏆 | 400,000 tokens |
| Agent Suitability | Not yet benchmarked | Not yet benchmarked |
| Time to First Token (TTFT) | No public TTFT data | No public TTFT data |
| Deployment Model | managed api | managed api |
| Production Stability | Beta Access (est.) | Stable GA (est.) |
| API Available | Yes | Yes |
| Released Date | 2026-07-09 | 2026-01-14 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5.6 Sol
$5.00
GPT-5.2-Codex
$1.75
Output Price per Million Tokens
GPT-5.6 Sol
$30.00
GPT-5.2-Codex
$14.00
💡 Cost Ratio: GPT-5.2-Codex is 2.9x cheaper per input token than GPT-5.6 Sol.
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Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
GPT-5.6 Sol Quirks & Gotchas
No developer gotchas reported.
GPT-5.2-Codex Quirks & Gotchas
No developer gotchas reported.
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