Claude Opus 4.7 (Fast) vs GPT-5.1
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.
Quick verdict: which should you choose?
Choose Claude Opus 4.7 (Fast) if you need
- ✓high intelligence (53.5 index) and nuanced reasoning for complex multimodal tasks
- ✓maximum 1M context window with effective large-context handling
- ✓strong safety alignment and careful outputs on edge cases
- ✓reduced-latency fast variant from Anthropic when quality outweighs cost
Choose GPT-5.1 if you need
- ✓highest output speed (102.85 t/s) for high-volume multimodal workloads
- ✓lowest price at $10 per 1M tokens when budget is constrained
- ✓native image/text/file integration at scale with 400k context
- ✓cost-efficient processing where raw throughput exceeds peak intelligence needs
Verdict
Claude Opus 4.7 (Fast) leads in intelligence and context scale while GPT-5.1 dominates on speed and price. Claude's 53.5 intelligence index and 1M context outperform GPT-5.1's 20.4 index and 400k context, yet GPT-5.1 delivers twice the tokens per second at 1/15th the cost. The choice hinges on whether nuanced reasoning or rapid, affordable multimodal throughput matters most.
Claude Opus 4.7 (Fast) vs GPT-5.1: side by side
| Spec | Claude Opus 4.7 (Fast) | GPT-5.1 | Winner |
|---|---|---|---|
| Intelligence | 53.5 | 20.4 | Claude Opus 4.7 (Fast) |
| Output speed | 52 t/s | 103 t/s | GPT-5.1 |
| Output price | $150.00/1M | $10.00/1M | GPT-5.1 |
| Context | 1000K | 400K | Claude Opus 4.7 (Fast) |
| Params | — | — | Tie |
| Provider | Anthropic | OpenAI | Tie |
Detailed analysis
Intelligence
Winner: Claude Opus 4.7 (Fast)Claude Opus 4.7 (Fast) scores 53.5 on the intelligence index versus GPT-5.1's 20.4. Its strengths in nuanced reasoning and safety alignment give it a clear edge for demanding multimodal analysis. GPT-5.1 shows no comparable intelligence metrics in the provided data.
Speed
Winner: GPT-5.1GPT-5.1 outputs at 102.85 tokens per second, nearly double Claude Opus 4.7 (Fast)'s 52.47 t/s. This speed advantage holds even though Claude is labeled a fast variant. Multimodal tasks may still slow Claude further per its listed limitations.
Pricing
Winner: GPT-5.1GPT-5.1 costs $10 per million tokens compared with Claude Opus 4.7 (Fast)'s $150 per million. The fifteen-fold price difference makes GPT-5.1 the economical choice for sustained use. No other cost factors are provided.
Context Window
Winner: Claude Opus 4.7 (Fast)Claude Opus 4.7 (Fast) supports a 1M token context versus GPT-5.1's 400k. Its listed strength in effective large-context handling reinforces this advantage. Both models remain proprietary with unstated parameter counts.
Claude Opus 4.7 (Fast)
Pros
- +Strong safety alignment
- +Nuanced and careful reasoning
- +Effective large-context handling
Cons
- –May decline edge-case or risky requests
- –Multimodal tasks can increase response time
- –Large context usage remains resource-heavy
GPT-5.1
Pros
- +Very large context window
- +Native support for images, text, and files
- +Strong multimodal integration
Cons
- –No audio or video modalities
- –Performance details unverified beyond specs
- –Potential latency with maximum context
Summary: Claude Opus 4.7 (Fast) vs GPT-5.1
Select Claude Opus 4.7 (Fast) when intelligence, safety, and maximum context are priorities. Choose GPT-5.1 when speed and low cost drive the decision for multimodal text, image, and file workloads. The data show a clear quality-versus-efficiency tradeoff between the two.
Frequently asked questions
Claude Opus 4.7 (Fast) is better on intelligence and context; GPT-5.1 is better on speed and price. No single winner exists across all metrics.