GPT-5.2 by OpenAI is the professional knowledge work frontier model with three variants: Instant, Thinking, and Pro, plus a Codex-optimized coding release.
Capabilities, design details, and architectural traits
GPT-5.2 is OpenAI's professional knowledge work flagship, explicitly designed around the economic output of knowledge workers across 44 occupations. It is the first model in the GPT-5 series where OpenAI measured success on GDPval - an eval that scores model outputs against the work of top industry professionals - making occupational-level performance the central release identity rather than abstract benchmark scores.
reasoning.effort='none' DefaultGPT-5.2 ships as three distinct models with separate API identifiers:
gpt-5.2-chat-latest (GPT-5.2 Instant) - fast, designed for info-seeking, how-tos, and everyday writinggpt-5.2 (GPT-5.2 Thinking) - reasoning model for coding, long-document analysis, and multi-step tasksgpt-5.2-pro (GPT-5.2 Pro) - highest compute, maximum accuracy on complex tasksAll three variants default to reasoning.effort='none', a setting introduced with GPT-5.2. This is a documented departure from earlier GPT-5 models, which defaulted to medium. It lowers latency at default and gives developers explicit control to increase reasoning depth as needed.
| Trait | Detail |
|---|---|
| GDPval-centered release identity | First OpenAI model released with professional occupational performance as the primary evaluation axis, covering 44 defined knowledge work roles |
reasoning.effort='none' as default | First GPT-5 series model to ship with reasoning off by default, making low-latency the baseline and high-effort reasoning opt-in |
/compact endpoint compatibility | Thinking variant supports the Responses API /compact endpoint, extending effective context beyond the model's physical context window for tool-heavy, long-running workflows |
| Dedicated Codex variant | Released a separate GPT-5.2-Codex model optimized specifically for agentic software engineering and defensive cybersecurity workloads |
xhigh reasoning effort | Both Thinking and Pro variants are the first to support the fifth reasoning effort level xhigh, in addition to none, low, medium, and high |
Independent evaluations · Artificial Analysis
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | December 11, 2025 | July 24, 2026 | June 9, 2026 |
| Knowledge Cutoff | - | May 2026 | - |
| Context & Limits | |||
| Context Window | 400K | 1M Best Context Window | 1M Best Context Window |
| Pricing (per 1M tokens) | |||
| Input Pricing | $1.75 Best Input Pricing | $5 | $10 |
| Output Pricing | $14 Best Output Pricing | $25 | $50 |
| Modalities | |||
| Inputs | fileimagetext | textimage | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 38.9 | 63.1 Best Intelligence Index | 62.1 |
| Coding Index | - | 78.0 Best Coding Index | 76.5 |
| Agentic Index | - | 59.2 Best Agentic Index | 56.6 |
Graduate-level reasoning and expert Q&A evaluation.
Extremely difficult logical reasoning and knowledge.
Logical reasoning over long context windows.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.