MODEL PROOF
Gemini 3.8 Flash
FRONTIER
Nothing is both better and cheaper under this workload.
- Independent LMArena score
- 1,494.7 ± 8.53 · 5,076 votes
- Context window
- 1.05M
- Maximum output
- 65.54K
- Input modalities
- text, image, video, file, audio
- Output modalities
- text
- Published input price
- $0.750 / 1M tokens
- Published output price
- $3.75 / 1M tokens
- Pricing kind
- fixed
MODEL MONUMENT
Save or share this proof
Google: Gemini 3.8 Flash. Balanced workload. Frontier. Evidence as of 19 Sept 2026.
$0.750/M in, $3.75/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. Nothing is both better and cheaper than Gemini 3.8 Flash.
Every price dimension
| Input | $0.750/M |
|---|---|
| Output | $3.75/M |
| Cached input | $0.075/M |
| Cache write | $0.042/M |
| Reasoning | $3.75/M |
| Web search | $0.014/call |
Reasoning tokens are billed separately at $3.75/M, on top of output. On a reasoning-heavy workload this can be 40% of the bill and it does not appear in the advertised price.
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Google AI Studio | $0.375 | $1.88 | undeclared | 99.90% |
| $0.375 | $1.88 | undeclared | 77.97% | |
| Google AI Studio | $0.750 | $3.75 | undeclared | 99.93% |
| $0.750 | $3.75 | undeclared | 98.79% | |
| Google AI Studio | $1.35 | $6.75 | undeclared | 99.63% |
| $1.35 | $6.75 | undeclared | 99.63% |
Independent scores
| LMArena Elo | 1494.7high |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- mobileapps #6of 40 1259
- uicomponent #7of 104 1340
- website #8of 114 1315
- codecategories #8of 108 1324
- gamedev #9of 107 1339
- webapps #10of 39 1256
- 3d #12of 100 1323
- fullstack #12of 41 1250
Capability
| Context window | 1.0M |
|---|---|
| Max output | 66K |
| Input modes | text, image, video, file, audio |
| Tool use | yes |
| Reasoning | always on |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-09-19 |
| Quality data | verified |
Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.
Questions this page answers
What does Gemini 3.8 Flash cost?
$0.750/M in, $3.75/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Gemini 3.8 Flash have an independent quality score?
Gemini 3.8 Flash has an LMArena score in this catalogue.
What beats Gemini 3.8 Flash?
Nothing is both better and cheaper than Gemini 3.8 Flash.
Does this page use Artificial Analysis scores for Gemini 3.8 Flash?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
Check whether this is still the one to buy
Badge
The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/google__gemini-3.8-flash/)<a href="https://undominated.ai/models/google__gemini-3.8-flash/"><img src="https://undominated.ai/badge/google__gemini-3.8-flash.svg" alt="Gemini 3.8 Flash — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/google__gemini-3.8-flash.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
older than the last deploy.
