Dated comparison: 3 September 2026
| Metric | Gemini 3.8 Flash | DeepSeek V4-Flash |
|---|---|---|
| AA Intelligence Index | 59 | Lower |
| Standard input / 1M (peak) | $0.75 | $0.44 |
| Standard input / 1M (off-peak) | $0.75 | $0.22 |
| Standard output / 1M | $3.75 | Lower |
| Modalities | Text, image, audio, video, PDF in | Text in |
| Output speed | ~305 tok/s | Comparable |
| Context window | 1,048,576 | Smaller |
| Weights | Closed | Open |
How to choose
Pick DeepSeek V4-Flash when headline per-token cost dominates and lower intelligence is acceptable. Pick Gemini 3.8 Flash when multimodal input, larger context, or higher index score justifies the per-token premium. The actual cost-per-completed-task gap depends on your workload.
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These figures are transcribed from the 3 September 2026 research snapshot. DeepSeek V4-Flash's exact peak and off-peak windows and the comparison cohort's intelligence index should be verified before quoting.
Frequently asked questions
How current is this information?
This page uses the verified research snapshot dated 3 September 2026. Verify current access, pricing and benchmark figures before a production decision.
Put Gemini 3.8 Flash to work
Fund a controlled evaluation, send a reference frame or document, and measure quality and cost on your own workload.