# Gemini 3.5 Flash — API pricing & integration guide | Y-API

> Gemini 3.5 Flash is a multimodal Flash-tier entry from Google, accepting text, image, video, file and audio input over a 1,048,576-token window. The publisher positions it for coding proficiency and parallel agentic execution.

This is the markdown representation of https://y-api.bestvirtualgoods.com/models/google/gemini-3.5-flash. Generated by `scripts/generate-seo-assets.mjs` from the same copy the page renders — do not edit by hand.

Model ID: `google/gemini-3.5-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

Consider it for agent fan-out, where several instances run the same kind of step in parallel, or for coding assistance that has to read a whole repository context in one request.

### What to watch for

Google deprecated this model on 2026-10-08: requests to it are automatically routed to 3.6 Flash, and its price has been withdrawn from the rate card. The wide modality list describes the model, not what the gateway will forward, and what answers a call is no longer this model — each media type needs its own check. Flash-tier naming is also not a latency measurement.

## 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 | 2026-05-19 |
| 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 | $2.00 | $12.00 |
| Cash equivalent | $0.20 | $1.20 |

$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: $8.00. Estimated cash equivalent: $0.80.

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 3.5 Flash](https://y-api.bestvirtualgoods.com/models/google/gemini-3.5-flash) | $8.00 | $0.80 |
| [Gemini 3.7 Flash](https://y-api.bestvirtualgoods.com/models/google/gemini-3.7-flash) | $5.25 | $0.525 |
| [Gemini 3.1 Pro Preview](https://y-api.bestvirtualgoods.com/models/google/gemini-3.1-pro-preview) | $9.50 | $0.95 |

[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

Split this feature request into independent workstreams that could be implemented in parallel, and name the shared files that would create conflicts.

```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-3.5-flash",
  "messages": [
    {
      "role": "user",
      "content": "Split this feature request into independent workstreams that could be implemented in parallel, and name the shared files that would create conflicts."
    }
  ],
  "max_tokens": 4096
}
JSON
```

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

payload = {
  "model": "google/gemini-3.5-flash",
  "messages": [
    {
      "role": "user",
      "content": "Split this feature request into independent workstreams that could be implemented in parallel, and name the shared files that would create conflicts."
    }
  ],
  "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

The split should be genuinely independent — check whether any two workstreams touch the same file. Then run the streams in parallel and see how many merge conflicts actually appear.

## Before you choose

### Should I use 3.5 Flash or the newer 3.7 and 3.8 Flash?

Reach for 3.8 Flash. Google deprecated 3.5 Flash on 2026-10-08 and now routes its requests to 3.6 Flash, so the model string no longer selects what runs — only keep it if you have results pinned to that generation and are testing the routing.

## 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-3.5-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.

### [Gemini 3.1 Pro Preview](https://y-api.bestvirtualgoods.com/models/google/gemini-3.1-pro-preview)

Gemini 3.1 Pro Preview is Google’s frontier reasoning entry, accepting text, image, file, audio and video input over a 1,048,576-token window. The Preview label reflects the publisher’s release stage, not a difference in how the API is called.

## Links

- HTML version of this page: https://y-api.bestvirtualgoods.com/models/google/gemini-3.5-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