Model comparison
Gemini 3 Deep Think vs Claude Opus 4.5
- Input
- Included with Google AI Ultra
- Output
- Included with Google AI Ultra
- Context
- 1M
- Released
- 2025-12-03
- Input
- $5.00
- Output
- $25.00
- Context
- 200K
- Released
- 2025-11-24
Gemini 3 Deep Think scores higher on 2 of the 2 benchmarks both models report; Gemini 3 Deep Think has the larger context window (1M vs 200K).
Specs and pricing side by side
| Spec | Gemini 3 Deep Think | Claude Opus 4.5 |
|---|---|---|
| Maker | Anthropic | |
| Released | 2025-12-03 | 2025-11-24 |
| Context window | 1M | 200K |
| Max output | 64K tokens | 64K |
| Input price | Included with Google AI Ultra | $5.00 |
| Output price | Included with Google AI Ultra | $25.00 |
| Parameters | Undisclosed (sparse mixture-of-experts) | Undisclosed |
| License | Proprietary | Proprietarysame |
| Weights | API only | API onlysame |
| Modalities | Text, Vision, Audio, Video | Text, Vision |
| Knowledge cutoff | January 2025 | May 2025 |
Benchmarks both models report
| Benchmark | Gemini 3 Deep Think | Claude Opus 4.5 |
|---|---|---|
| GPQA Diamond | 93.8% | 87% |
| ARC-AGI-2 | 45.1% | 37.6% |
Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.
Which one should you pick?
Pick Gemini 3 Deep Think if…
- You care about GPQA Diamond, ARC-AGI-2 (it scores higher on 2 shared benchmarks).
- You need the longer context (1M vs 200K).
- You need Audio / Video input, which Claude Opus 4.5 lacks.
- Your use case is: tackling competition-grade and research-level mathematics and proofs.
Pick Claude Opus 4.5 if…
- Your use case is: reach for it when you need a capable model for multi-step agentic coding and bug-fixing across real repositories.
FAQ
Which is better, Gemini 3 Deep Think or Claude Opus 4.5?
Gemini 3 Deep Think scores higher on 2 of the 2 benchmarks both models report; Gemini 3 Deep Think has the larger context window (1M vs 200K). The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
What are the context windows of Gemini 3 Deep Think and Claude Opus 4.5?
Gemini 3 Deep Think offers 1M with up to 64K tokens output; Claude Opus 4.5 offers 200K with up to 64K output.
Is Gemini 3 Deep Think newer than Claude Opus 4.5?
Gemini 3 Deep Think was released 2025-12-03; Claude Opus 4.5 was released 2025-11-24.
Go deeper
- Gemini 3 Deep Think: full specs, pricing and benchmarks
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