Claude Sonnet 4.5 vs GPT-5 Mini
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 Sonnet 4.5 if you need
- ✓maximum 1M-token contexts with reliable large-scale handling
- ✓strong safety alignment and careful detailed reasoning
- ✓effective multimodal file support in complex scenarios
- ✓applications where cautious refusals are acceptable
Choose GPT-5 Mini if you need
- ✓lowest cost at $2 per million tokens
- ✓high documented output speed of 95.36 t/s
- ✓efficient text-image-file integration in multi-turn tasks
- ✓compact multimodal design on a budget
Verdict
Claude Sonnet 4.5 leads on maximum context size and safety-focused detailed reasoning for large multimodal tasks, while GPT-5 Mini leads on price and documented output speed. Claude's 1M context and file support suit extensive analysis, but GPT-5 Mini's $2/1M pricing and 95.36 t/s speed make it far more efficient for volume workloads.
Claude Sonnet 4.5 vs GPT-5 Mini: side by side
| Spec | Claude Sonnet 4.5 | GPT-5 Mini | Winner |
|---|---|---|---|
| Intelligence | — | 30.9 | Tie |
| Output speed | — | 95 t/s | Tie |
| Output price | $15.00/1M | $2.00/1M | GPT-5 Mini |
| Context | 1000K | 400K | Claude Sonnet 4.5 |
| Params | — | — | Tie |
| Provider | Anthropic | OpenAI | Tie |
Detailed analysis
Context Handling
Winner: Claude Sonnet 4.5Claude Sonnet 4.5 offers a 1,000,000 token context versus GPT-5 Mini's 400,000. This supports more reliable large-scale multimodal reasoning and analysis.
Pricing
Winner: GPT-5 MiniGPT-5 Mini is priced at $2 per million tokens compared to Claude Sonnet 4.5 at $15. The 7.5x cost difference favors GPT-5 Mini for high-volume use.
Multimodal Capabilities
Winner: TieBoth integrate text, image, and file inputs. Claude emphasizes effective file support while GPT-5 Mini focuses on compact design for complex multi-turn tasks.
Reasoning and Safety
Winner: Claude Sonnet 4.5Claude provides strong safety alignment and careful reasoning. GPT-5 Mini notes reduced depth on highly complex tasks and may require careful prompting.
Claude Sonnet 4.5
Pros
- +Strong safety alignment
- +Reliable handling of large contexts
- +Careful and detailed reasoning
Cons
- –Can be overly cautious with refusals
- –Vision performance varies by image complexity
- –May produce verbose responses
GPT-5 Mini
Pros
- +Handles very large contexts efficiently
- +Integrates text, image, and file inputs
- +Suitable for complex multi-turn tasks
Cons
- –Reduced depth on highly complex reasoning vs full-size models
- –Performance depends on input clarity across modalities
- –May require careful prompting for nuanced outputs
Summary: Claude Sonnet 4.5 vs GPT-5 Mini
Select Claude Sonnet 4.5 when maximum context and safety-aligned multimodal analysis are required. Choose GPT-5 Mini for cost efficiency, speed, and practical multimodal handling in most production settings.
Frequently asked questions
Claude Sonnet 4.5 excels at large-scale reasoning with 1M context and strong safety; GPT-5 Mini is better for efficient, lower-cost multimodal integration.