# Gemini 3.8 Flash — API pricing & integration guide | Y-API

> Gemini 3.8 Flash is the newest Flash-tier entry from Google, with a 1,048,576-token window and text, image, video, file and audio input. The publisher describes it as improving on 3.7 Flash in software engineering and multi-step reasoning.

This is the markdown representation of https://y-api.bestvirtualgoods.com/models/google/gemini-3.8-flash. Generated by `scripts/generate-seo-assets.mjs` from the same copy the page renders — do not edit by hand.

Model ID: `google/gemini-3.8-flash`

Sources reviewed: 2026-10-11. Y-API catalog snapshot: 2026-10-11.

## Choosing this model

Selection advice by Y-API. The checks below are suggested evaluations, not published test results.

### Where to start

Try it as the default Flash-tier workhorse for coding assistance and agentic steps, where you want the current generation without paying the Pro tier’s per-token rate.

### What to watch for

This is the entry the older Flash generations now route to: Google deprecated 3.7 Flash on 2026-10-08 and sends its requests here, so a migration is about picking the right model string rather than about budget. The very wide modality list is a model specification; each format still needs a gateway compatibility check.

## Model specifications

These are OpenRouter model-level specifications, not a Y-API compatibility test. A particular route may accept fewer input formats, parameters or tokens. Verify the features you need with a small request; a successful text response does not validate vision or tool calling.

| Field | Value |
| --- | --- |
| Context window | 1,048,576 tokens |
| Input | Text, Image, Video, File, Audio |
| Output | Text |
| Listed on OpenRouter | 2026-09-02 |
| Parameters listed by OpenRouter | `include_reasoning`, `max_tokens`, `reasoning`, `reasoning_effort`, `response_format`, `seed`, `stop`, `structured_outputs`, `temperature`, `tool_choice`, `tools`, `top_p` |

## API pricing & cost estimate

| Price basis | Input / 1M tokens | Output / 1M tokens |
| --- | --- | --- |
| Account credit | $1.50 | $7.50 |
| Cash equivalent | $0.15 | $0.75 |

$1 paid adds $10 of credit. Cash equivalent = credit consumed ÷ 10; this is not the model publisher’s list price.

Input tokens / request: 1000. Output tokens / request: 500. Number of requests: 1000.

Estimated credit consumed: $5.25. Estimated cash equivalent: $0.525.

Illustrative token budget, not measured usage or a quote. Includes input and output; excludes separate media charges, cache discounts and retries. Include billed reasoning tokens in your output budget where applicable. Actual billing follows usage returned by the service.

### Same token budget, different models

| Model | Estimated credit consumed | Estimated cash equivalent |
| --- | --- | --- |
| [Gemini 3.8 Flash](https://y-api.bestvirtualgoods.com/models/google/gemini-3.8-flash) | $5.25 | $0.525 |
| [Gemini 3.7 Flash](https://y-api.bestvirtualgoods.com/models/google/gemini-3.7-flash) | $5.25 | $0.525 |
| [Qwen3.8 Flash](https://y-api.bestvirtualgoods.com/models/qwen/qwen3.8-flash) | $0.45 | $0.045 |

[View LLM API pricing & billing](https://y-api.bestvirtualgoods.com/pricing)

## API integration examples

These minimal, text-only requests use the exact Y-API model ID. They do not demonstrate image, audio, video, file or tool support. The output limit also needs room for reasoning; an empty answer with finish_reason=length can mean the budget was exhausted.

Set the TOKEN environment variable to a key from your console. Run this on your server or locally; never expose a key in browser code or a public repository.

### A task to try

Review this diff for correctness and say which change you would revert first if the test suite fails after merging.

```bash
curl --fail-with-body --silent --show-error --max-time 120 \
  'https://api.y-api.bestvirtualgoods.com/v1/chat/completions' \
  -H "Authorization: Bearer ${TOKEN:?Set TOKEN first}" \
  -H 'Content-Type: application/json' \
  --data-binary @- <<'JSON'
{
  "model": "google/gemini-3.8-flash",
  "messages": [
    {
      "role": "user",
      "content": "Review this diff for correctness and say which change you would revert first if the test suite fails after merging."
    }
  ],
  "max_tokens": 4096
}
JSON
```

```python
import json
import os
import sys
import urllib.error
import urllib.request

payload = {
  "model": "google/gemini-3.8-flash",
  "messages": [
    {
      "role": "user",
      "content": "Review this diff for correctness and say which change you would revert first if the test suite fails after merging."
    }
  ],
  "max_tokens": 4096
}

request = urllib.request.Request(
    "https://api.y-api.bestvirtualgoods.com/v1/chat/completions",
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Authorization": "Bearer " + os.environ["TOKEN"],
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urllib.request.urlopen(request, timeout=120) as response:
        result = json.load(response)
    print(json.dumps(result, ensure_ascii=False, indent=2))
except urllib.error.HTTPError as error:
    print(error.read().decode("utf-8"), file=sys.stderr)
    raise SystemExit(1)
```

### How to evaluate the result

Check whether the identified change is genuinely the riskiest one by reverting it in a scratch branch and running the tests. Then compare the review against the 3.7 entry on the same diff.

## Before you choose

### Which Gemini Flash should new integrations start with?

Start with the newest, 3.8 Flash — it is also what calls to the deprecated 3.7 Flash now reach, so a request to either name lands on the same model. Keep the evaluation harness so you can re-check when the next Flash entry arrives.

## Sources & scope

Technical facts come from the cited model page and, where available, its linked publisher card. A card describes that checkpoint; it is not proof of the weights a gateway serves. Prices come only from the Y-API catalog. We do not claim measured latency, uptime or benchmark scores for this endpoint.

- [OpenRouter model page & specifications](https://openrouter.ai/google/gemini-3.8-flash)
- [Y-API catalog & prices (JSON)](https://y-api.bestvirtualgoods.com/models.json)

## Models to compare

Compare these alternatives on the same inputs. Their descriptions explain different roles; a lower price does not establish equivalent quality.

### [Gemini 3.7 Flash](https://y-api.bestvirtualgoods.com/models/google/gemini-3.7-flash)

Gemini 3.7 Flash is a multimodal entry built for fast agentic workflows, coding and multi-step reasoning, with a 1,048,576-token window over text, image, video, file and audio input.

### [Qwen3.8 Flash](https://y-api.bestvirtualgoods.com/models/qwen/qwen3.8-flash)

Qwen3.8 Flash is Alibaba’s multimodal reasoning entry for text, images and video in the OpenRouter catalog. It brings document and chart understanding into the same model selection as coding assistance and long-context analysis.

## Links

- HTML version of this page: https://y-api.bestvirtualgoods.com/models/google/gemini-3.8-flash
- Site index for agents: https://y-api.bestvirtualgoods.com/llms.txt
- Full reference (single file): https://y-api.bestvirtualgoods.com/llms-full.txt
- OpenAPI 3.1 spec: https://y-api.bestvirtualgoods.com/openapi.json
- Model catalog (JSON, no key needed): https://y-api.bestvirtualgoods.com/models.json
- API base URL: `https://api.y-api.bestvirtualgoods.com/v1`
- Contact: support@bestvirtualgoods.com
- Model catalog: https://y-api.bestvirtualgoods.com/models
- Integration guide: https://y-api.bestvirtualgoods.com/docs