Claude Opus 4.8 vs Gemini 3 Flash Preview
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 4.8 if you need
- ✓Choose Gemini 3 Flash Preview if you need fast inference at 168.18 tokens per second.
- ✓Choose Gemini 3 Flash Preview if you need broad native support for text, image, audio, video and files.
- ✓Choose Gemini 3 Flash Preview if you need the lowest price at $3 per million tokens.
- ✓Choose Gemini 3 Flash Preview if you need a slightly larger 1,048,576-token context window.
Choose Gemini 3 Flash Preview if you need
- ✓Choose Claude Opus 4.8 if you need higher intelligence at 55.7 index points.
- ✓Choose Claude Opus 4.8 if you need careful and nuanced reasoning over long inputs.
- ✓Choose Claude Opus 4.8 if you need robust safety alignment in multimodal tasks.
- ✓Choose Claude Opus 4.8 if you need strong integration of text, images, and files.
Verdict
Claude Opus 4.8 leads in intelligence (55.7 vs 37.8) and nuanced multimodal reasoning while Gemini 3 Flash Preview dominates on speed (168.18 t/s vs 61.86 t/s) and price ($3 vs $25 per million tokens). Both handle million-token contexts effectively, but Gemini adds native audio and video support. Claude is the stronger reasoning engine; Gemini is the faster, cheaper preview option.
Claude Opus 4.8 vs Gemini 3 Flash Preview: side by side
| Spec | Claude Opus 4.8 | Gemini 3 Flash Preview | Winner |
|---|---|---|---|
| Intelligence | 55.7 | 37.8 | Claude Opus 4.8 |
| Output speed | 62 t/s | 168 t/s | Gemini 3 Flash Preview |
| Output price | $25.00/1M | $3.00/1M | Gemini 3 Flash Preview |
| Context | 1000K | 1049K | Gemini 3 Flash Preview |
| Params | — | — | Tie |
| Provider | Anthropic | Tie |
Detailed analysis
Intelligence
Winner: Claude Opus 4.8Claude Opus 4.8 scores 55.7 on the intelligence index compared with Gemini 3 Flash Preview at 37.8. Its strengths explicitly include careful and nuanced reasoning, while Gemini notes shallower reasoning depth than full-scale models.
Speed
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview outputs at 168.18 tokens per second versus Claude Opus 4.8 at 61.86 tokens per second. Gemini's fast inference is listed as suitable for preview use, while Claude has higher latency on large contexts.
Pricing
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview costs $3 per million tokens compared with Claude Opus 4.8 at $25 per million tokens. No other pricing details are provided.
Multimodal Support
Winner: Gemini 3 Flash PreviewGemini 3 Flash Preview lists native support for text, image, audio, video and files. Claude Opus 4.8 emphasizes strong multimodal integration of text, images, and files without mentioning audio or video.
Claude Opus 4.8
Pros
- +Handles extremely long inputs effectively
- +Strong multimodal integration of text, images, and files
- +Careful and nuanced reasoning
Cons
- –Higher latency on large contexts
- –Conservative response style due to safety tuning
- –May require explicit guidance for creative tasks
Gemini 3 Flash Preview
Pros
- +Broad native support for text, image, audio, video and files
- +Efficient handling of very large contexts
- +Fast inference suitable for preview use
Cons
- –Preview status may include occasional instability
- –Reasoning depth can be shallower than full-scale models
- –No native tool-use or external browsing mentioned
Summary: Claude Opus 4.8 vs Gemini 3 Flash Preview
Select Gemini 3 Flash Preview when speed, low cost, and broad audio-video support matter most. Select Claude Opus 4.8 when maximum intelligence and nuanced reasoning are required. The two models trade off performance depth against efficiency and price.
Frequently asked questions
Claude Opus 4.8 scores higher on intelligence while Gemini 3 Flash Preview is faster and cheaper; neither is universally better.