Claude Opus 4.8 (Fast) vs GPT-5 Nano
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Claude Opus 4.8 (Fast) vs GPT-5 Nano: side by side
| Spec | Claude Opus 4.8 (Fast) | GPT-5 Nano | Winner |
|---|---|---|---|
| Intelligence | 61.4 | 26.8 | Claude Opus 4.8 (Fast) |
| Output speed | 62 t/s | 170 t/s | GPT-5 Nano |
| Output price | $50.00/1M | $0.40/1M | GPT-5 Nano |
| Context | 1000K | 400K | Claude Opus 4.8 (Fast) |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | Anthropic | OpenAI | Tie |
Claude Opus 4.8 (Fast)
Pros
- +Strong safety alignment
- +Nuanced and careful reasoning
- +Effective large-context handling
- +High-quality writing and analysis
Cons
- –Can be overly cautious on edge cases
- –Multimodal performance varies with image clarity
- –Fast mode may trade some depth for speed
GPT-5 Nano
Pros
- +Handles very large contexts efficiently
- +Supports text, image, and file inputs
- +Lightweight design for faster responses
- +Practical for extended document tasks
Cons
- –Lower capability depth than full-scale models
- –May struggle with highly complex reasoning
- –Trade-off in advanced task performance
Frequently asked questions
It depends on your needs. Claude Opus 4.8 (Fast) and GPT-5 Nano are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.