Google Gemini 3.1 Flash Lite preview

OpenRouter chat

Google Gemini 3.1 Flash Lite preview is an OpenRouter chat model.It supports a 1,048,576-token context windowwith up to 65,536 output tokens.Input is priced at $0.250/M tokens and output at $1.50/M tokens. Capabilities include function calling, vision, reasoning, audio input. Route Google Gemini 3.1 Flash Lite preview via Future AGI's Agent Command Center for unified observability, caching, and 15 routing strategies including cost-optimized fallback.

Pricing source: litellm Last verified: May 12, 2026 View source ↗
Cost calculator

Estimate Google Gemini 3.1 Flash Lite preview spend

Pick a workload, fine-tune the sliders, and see the monthly bill.

~3K in / ~400 out · 5K req/day
3,000
01,048,576
400
065,536
5,000
01,000,000
cached @ $0.0250/M
Per request
$0.001350
in $0.000750 · out $0.000600
Per day
$6.75
5,000 requests
Per month
$205
152,188 requests

Estimate uses $0.2500/M input · $1.50/M output. Provider pricing changes. Production costs vary with retries, streaming overhead, and tool-call rounds.
Want this for free? Cache + route via Agent Command Center — first 100K requests and 100K cache hits free every month.

Pricing

Per-token rates, expressed in USD per 1M tokens. Verified May 12, 2026.

Input $0.250/M
Output $1.50/M
Cached input $0.0250/M

Limits

Context window
1,048,576 tokens
Max input
1,048,576 tokens
Max output
65,536 tokens
Modalities
vision, audio_in, pdf, video, text

Capabilities

  • Function calling ✓ supported
  • Parallel tool calls ✓ supported
  • Vision input ✓ supported
  • Audio input ✓ supported
  • Audio output — not advertised
  • PDF input ✓ supported
  • Streaming ✓ supported
  • Structured output ✓ supported
  • Prompt caching ✓ supported
  • Reasoning ✓ supported

Where it's strong

  • +long-context tasks — context window in the top 2% of peers
  • +audio input — only 4% of chat models on Future AGI advertise this
  • +PDF input — only 16% of chat models on Future AGI advertise this
  • +parallel tool calls — only 21% of chat models on Future AGI advertise this

Watch out for

  • No major caveats flagged from public spec.

Benchmarks pending

We haven't logged public benchmark scores for Google Gemini 3.1 Flash Lite preview yet. Have one to contribute? Submit a source — citations help us prioritise.

Try it

Call Google Gemini 3.1 Flash Lite preview via Agent Command Center

One OpenAI-compatible endpoint. Routing, fallback, semantic caching, guardrails, and cost tracking come along for the ride. First 100K requests + 100K cache hits free every month.

SDK
Native Future AGI client (agentcc / @agentcc/client). Per-call metadata — provider, cost, latency, cache hit, request id — is returned on x-agentcc-* response headers, so any HTTP client can read it.
# Google Gemini 3.1 Flash Lite preview via the Agent Command Center Python SDK
# pip install agentcc
import os
from agentcc import AgentCC

client = AgentCC(
    api_key=os.environ["AGENTCC_API_KEY"],   # from app.futureagi.com → Settings → API Keys
    base_url="https://gateway.futureagi.com/v1",
)

resp = client.chat.completions.create(
    model="openrouter/google-gemini-3-1-flash-lite-preview",
    messages=[{"role": "user", "content": "Hello, Google Gemini 3.1 Flash Lite preview!"}],
)

print(resp.choices[0].message.content)
print(f"Tokens: {resp.usage.total_tokens}")

# Per-call gateway metadata is returned on x-agentcc-* response headers.
# When you need it programmatically, use .with_raw_response to get them:
raw = client.chat.completions.with_raw_response.create(
    model="openrouter/google-gemini-3-1-flash-lite-preview",
    messages=[{"role": "user", "content": "Same call, but I want the headers."}],
)
print("Provider:", raw.headers.get("x-agentcc-provider"))
print("Latency:", raw.headers.get("x-agentcc-latency-ms"), "ms")
print("Cost:   ", raw.headers.get("x-agentcc-cost"), "USD")
print("Cache:  ", raw.headers.get("x-agentcc-cache"))
Set AGENTCC_API_KEY with a key fromapp.futureagi.com.Gateway docs ↗

Compare with similar models

Google Gemini 3.1 Flash Lite preview doesn't have a public Arena ELO score yet, so we group by provider only — quality-tier comparisons need a benchmark.

FAQ

How much does Google Gemini 3.1 Flash Lite preview cost?

Input is priced at $0.250 per 1M tokens and output at $1.50 per 1M tokens (OpenRouter, last verified May 12, 2026).

What is the context window of Google Gemini 3.1 Flash Lite preview?

Google Gemini 3.1 Flash Lite preview supports a 1,048,576-token context window with up to 65,536 output tokens.

Does Google Gemini 3.1 Flash Lite preview support function calling?

Yes — Google Gemini 3.1 Flash Lite preview supports function (tool) calling, including parallel tool calls.

Is Google Gemini 3.1 Flash Lite preview good for production?

Google Gemini 3.1 Flash Lite preview is well-suited for long-context tasks — context window in the top 2% of peers and audio input — only 4% of chat models on Future AGI advertise this.

How can I route to Google Gemini 3.1 Flash Lite preview with fallback?

Use Agent Command Center: a single OpenAI-compatible endpoint that supports cost-optimized routing, latency-aware retries, model fallback, and shadow traffic. Configure once, swap models without app changes.

Useful links for Google Gemini 3.1 Flash Lite preview

Official sources, independent benchmarks, and pricing aggregators — no random search-engine guesses.