GPT-5.5 Pro
OpenAIHighest-tier GPT-5 with extended reasoning; pro mode for hardest tasks.
Long context (400K+)Frontier intelligenceStrong reasoningMultimodal visionAudio
TextVisionAudioTool useReasoningCode
Performance
Artificial Analysis — Intelligence Index· 2026-06-17| Intelligence Index | 63Frontier · /100 |
| Coding | 96 |
| Math | 94 |
| Reasoning | 95 |
| Vision | 86 |
| Arena Elo | 1492Top-tier |
Specifications
| Vendor | OpenAI |
| Family | GPT |
| Context | 400K · 300k words（≈ a novella） |
| Max output | 130K · 97.5k words（≈ a thesis） |
| Released | 2026-05-28 |
| Open source | No |
| Tool use | ✓ |
Technical specs (developers: rate limits / latency / throughput)
| Rate limit (RPM) | 100 |
| Rate limit (TPM) | 50,000 |
| TTFT | 480 ms |
| Output speed | 60 tok/s |
Pricing across channels
per 1M tokens, USD
| Channel | Type | Input | Output | → |
|---|---|---|---|---|
| OpenAI Platform | Official | $30.00 | $180.00 | visit |
| OpenRouter | Aggregator | $30.00 | $180.00 | visitAd |
OpenAI Pricing· 2026-06-17
Related models
Similar tier, vendor or price range