Head-to-head
DeepSeek V3 (Thinking) vs GPT-5.5
As of October 25, 2026, GPT-5.5 leads DeepSeek V3 (Thinking) on the Analyzer Index, 91.2 to 82.0.
Normalized scores are min-maxed per benchmark across all models we track (0–100). Open the interactive compare view to add benchmarks to the radar chart or pull in more models.
DeepSeek V3 (Thinking)
DeepSeekGPT-5.5
OpenAI| At a glance | DeepSeek V3 (Thinking) | GPT-5.5 |
|---|---|---|
| Analyzer Index | 82.0 (4/13) | 91.2 (7/13) |
| Blended price | $0.50/M | $5.63/M |
| Cheapest host | $0.44/M | maker's API |
| Context | 128k | 400k |
| Output speed | 25 tok/s | 104 tok/s |
| Time to first token | 1.73 s | 2.23 s |
| Benchmark | DeepSeek V3 (Thinking) | GPT-5.5 |
|---|---|---|
Chatbot Arena Elo Arena | ||
SWE-bench Verified SWE-bench | — | |
Output Speed Speed | ||
Time to First Token TTFT | ||
Rolling Contamination-Controlled Average Rolling Avg | — | |
Rolling Data Analysis Data Analysis | — | |
FrontierMath Tiers 1-3 FrontierMath | — | |
SimpleQA Verified SimpleQA | — | |
OTIS Mock AIME 2024-2025 OTIS AIME | — | |
ARC-AGI 2 ARC-AGI 2 | — | |
Aider Polyglot Aider | — | |
Terminal-Bench 2 TermBench 2 | — | |
Frontier Composite Frontier | — | |
Output Stability Stability | — | |
Format Adherence Format | — | |
Recovery Rate Recovery | — | |
API Success Rate API OK | — | |
Safety Handling Safety | — |
Methodology matches the main AI Model Analyzer About page.