GPT-5 Pro vs GPT Chat Latest
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-5 Pro and GPT Chat Latest.
GPT-5 Pro
GPT-5 Pro is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and...
GPT Chat Latest
GPT Chat Latest points to OpenAI's stable API alias `chat-latest` that always resolves to the latest Instant chat model used in ChatGPT. As OpenAI rolls out new Instant model updates...
Technical Specifications
| Specification | GPT-5 Pro | GPT Chat Latest |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Context Window | 400,000 tokens | 400,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-10-06 | 2026-05-05 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5 Pro
$15.00
GPT Chat Latest
$5.00
Output Price per Million Tokens
GPT-5 Pro
$120.00
GPT Chat Latest
$30.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-5 Pro Quirks & Gotchas
No developer gotchas reported.
GPT Chat Latest Quirks & Gotchas
No developer gotchas reported.