OpenAI
GPT-5.5
ReasoningClosed weights
- Intelligence
- 30.7
- Rank 120 of 744 measured models
- Coding
- 60.9
- Rank 82 of 298 measured models
- Output speed
- 82.7 t/s
- Rank 222 of 403 measured models
- Price/1M
- $11.25
- Rank 630 of 659 measured models
- Context window
- 922K
- Rank 330 of 1199 measured models
GPT-5.5 (Low) scores 30.7 on the Artificial Analysis Intelligence Index, ranking 120th of 744 measured models. The closest models on this index are K2 Horizon 375B A23B (30.5), DeepSeek V4 Pro 0424 (30.4), and GPT-5.2 (30.4). At $11.25 per million tokens (3:1 input/output blended price), it is more expensive than DeepSeek V4 Pro 0424 ($0.544) and GPT-5.2 ($4.81). With an output speed of 82.7 t/s, it is faster than GPT-5.2 (73.3 t/s), about as fast as DeepSeek V4 Pro 0424 (83.8 t/s), slower than K2 Horizon 375B A23B (480 t/s).
Models at a similar level
The closest models on the Intelligence Index, one configuration per family.
- K2 Horizon 375B A23B
Institute of Foundation Models · — · 480 t/s
30.5−0.2—480 t/sCompare - DeepSeek V4 Pro 0424
DeepSeek · $0.544 · 83.8 t/s
30.4−0.3$0.54483.8 t/sCompare - GPT-5.2
OpenAI · $4.81 · 73.3 t/s
30.4−0.3$4.8173.3 t/sCompare - Claude Sonnet 4.6 (batch)
Anthropic · — · —
30.1−0.6——Compare
