> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kymaapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Gemini 3.8 Flash

> Google's newest Flash tier, generally available since September 2, 2026 — the same 1M-token context and 64K output ceiling as 3.7 Flash, at the same list rate, with Google's largest Flash-to-Flash gains on software engineering and agentic tasks.

## Overview

Gemini 3.8 Flash is Google's September 2026 Flash-tier release. It accepts text, image, audio, video and file input and returns text, with reasoning, tool calling and structured outputs on one request. Google's model card puts the knowledge cutoff at March 2026.

Against 3.7 Flash the shape is unchanged — 1,048,576 tokens of context and 65,536 tokens of output — and the difference is quality: Google positions it as its most intelligent Flash model, with the biggest gains on software engineering, long-horizon agentic work and multimodal understanding.

On Kyma it serves through an OpenAI-compatible endpoint with automatic failover to a second independent route. Prompt caching is supported and repeated prefixes bill at this model's cached input rate. Every response carries the exact request cost in usage.cost and names the model that answered in the X-Kyma-Model header.

## Specs

| Field              | Value                                                 |
| ------------------ | ----------------------------------------------------- |
| Model ID           | `gemini-3.8-flash`                                    |
| Best for           | High-volume agentic and multimodal work at 1M context |
| Context window     | 1.048576M                                             |
| Max output tokens  | 66K                                                   |
| Input modalities   | Text, Image, Video, File, Audio                       |
| Output modalities  | Text                                                  |
| Tool calling       | Yes                                                   |
| Structured outputs | Yes                                                   |
| Prompt caching     | Yes                                                   |
| Speed              | Fast                                                  |
| Cost band          | Premium                                               |
| Release stage      | Stable                                                |

## Pricing

|        | Per 1M tokens |
| ------ | :-----------: |
| Input  |    \$2.026    |
| Output |    \$10.126   |

## Use this when

* **Agentic coding at Flash cost** — Multi-step tool use over a large repository, with reasoning and structured outputs, at the Flash tier's price and latency.
* **Long-form structured extraction** — Reads a 1M-token corpus and emits tens of thousands of tokens of schema-constrained JSON in a single response.
* **Whole-document translation and rewriting** — The 64K output ceiling fits an entire long document's rewritten text without splitting the job into chunks.
* **Multimedia review** — Takes video, audio, images and files alongside a text prompt and returns a long written analysis in one pass.

## Not ideal for

Do not reach for this when a short reply is all you need and cost is the deciding factor — the cheaper Flash tiers answer the same short prompts, and the large output ceiling buys nothing you will use.

## Pick something else when

* You need the cheapest 1M-context tier and replies stay short: use [`gemini-3.5-flash-lite`](/models/gemini-3.5-flash-lite).
* You want the previous Flash generation at the same list rate: use [`gemini-3.7-flash`](/models/gemini-3.7-flash).
* You need a frontier-tier model rather than a Flash tier: use [`claude-fable-5.1`](/models/claude-fable-5.1) or [`gpt-5.6-sol`](https://kymaapi.com/models/gpt-5.6-sol).

## Example

```python theme={null}
from openai import OpenAI

client = OpenAI(base_url="https://kymaapi.com/v1", api_key="kyma-...")

response = client.chat.completions.create(
    model="gemini-3.8-flash",
    messages=[{"role": "user", "content": "..."}],
    tools=[...],  # function calling supported
)
```

## Agent query example

Ask the API which models fit, instead of hardcoding an id:

```bash theme={null}
curl "https://kymaapi.com/v1/models?recommended_for=chat&tools=true&quality_tier=frontier-open"
```

## FAQ

**How is this different from Gemini 3.7 Flash?**

Same context (1M tokens), same output ceiling (64K), same input set and same list price. The difference is the model itself: Google reports its largest Flash-to-Flash gains on software engineering and agentic tasks. If 3.7 Flash already does the job, nothing forces a move; new work should start on 3.8.

**Is the current price permanent?**

No. Google publishes a launch rate through December 31, 2026 and a higher list rate after that; the Pricing table on this page shows the promotional rate, the date it is promised through, and the list rate it returns to.

**Does prompt caching work on this model?**

Yes. Repeated prompt prefixes bill at this model's cached input rate, and the saving is reported per request in usage.cache\_discount.