Gemini 3.1 Flash-Lite Preview vs Grok Code Fast 1

Gemini 3.1 Flash-Lite Preview vs Grok Code Fast 1: Grok Code Fast 1 is cheaper for input-heavy usage ($0.20/M vs $0.25/M input tokens), while Gemini 3.1 Flash-Lite Preview is better for long-context tasks (1,000,000 tokens).

Direct answer: choose Grok Code Fast 1 for lower token spend and choose Gemini 3.1 Flash-Lite Preview when your workload needs longer context.

Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.

Google

Gemini 3.1 Flash-Lite Preview

xAI

Grok Code Fast 1

Try Google →Try xAI →

Gemini 3.1 Flash-Lite Preview pricing page Grok Code Fast 1 pricing page Google provider overview xAI provider overview

Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

Gemini 3.1 Flash-Lite Preview

Per Request:$0.001000

Daily:$0.10

Monthly:$3.00

Yearly:$36.50

Grok Code Fast 1

Per Request:$0.000950

Daily:$0.095

Monthly:$2.85

Yearly:$34.675

Cost Differences

$0.000050

Per Request

$0.005000

Daily

$0.15

Monthly

$1.825

Yearly

Grok Code Fast 1 costs less than Gemini 3.1 Flash-Lite Preview

Quick Recommendation

Winner for direct API pricing: Grok Code Fast 1. At the default workload, Grok Code Fast 1 saves about $0.15/month ($1.825/year) versus Gemini 3.1 Flash-Lite Preview.

Gemini 3.1 Flash-Lite Preview full pricing breakdown Grok Code Fast 1 full pricing breakdown Google API pricing details xAI API pricing details Google vs xAI API pricing Codex Mini vs Gemini 3.1 Flash-Lite Preview Codex Mini vs Gemini 3.1 Pro

Feature Comparison

Feature	Gemini 3.1 Flash-Lite Preview	Grok Code Fast 1
Provider	Google	xAI
Input Price	$0.25/1M tokens	$0.20/1M tokens
Output Price	$1.50/1M tokens	$1.50/1M tokens
Context Window	1,000,000 tokens	256,000 tokens
Max Output	8,192 tokens	32,768 tokens
Category	efficient	standard
Capabilities	textvisioncode	textcodereasoning
Release Date	3/3/2026	2/1/2026

Gemini 3.1 Flash-Lite Preview vs Grok Code Fast 1: Which Should You Choose?

Choosing between Gemini 3.1 Flash-Lite Preview and Grok Code Fast 1 depends on your priorities: cost efficiency, context length, or raw capability. Grok Code Fast 1 is the more affordable option at $0.20/1M input tokens — 20% cheaper than Gemini 3.1 Flash-Lite Preview. Meanwhile, Gemini 3.1 Flash-Lite Preview offers a significantly larger context window at 1,000,000 tokens vs 256,000 for Grok Code Fast 1.

These models come from different providers — Google and xAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Google, switching to xAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.

These models target different tiers: Gemini 3.1 Flash-Lite Preview is a efficient model while Grok Code Fast 1 is standard. This means they're optimized for different workloads. Grok Code Fast 1 targets more demanding workloads, while Gemini 3.1 Flash-Lite Preview provides a cost-effective option for everyday tasks.

Output costs matter too. Gemini 3.1 Flash-Lite Preview charges $1.50/1M output tokens vs $1.50 for Grok Code Fast 1.

Multimodal capabilities: Gemini 3.1 Flash-Lite Preview supports vision (image inputs) while Grok Code Fast 1 is text-only. If your application needs image understanding, this narrows your choice.

Best Use Cases

Choose Gemini 3.1 Flash-Lite Preview when:

• You need a larger context window (1,000,000 tokens)
• You're already using Google's API ecosystem
• You're running high-volume, latency-sensitive workloads

Choose Grok Code Fast 1 when:

• Budget is a primary concern
• You need longer outputs (up to 32,768 tokens)
• You're already using xAI's API ecosystem

Pros and Caveats at a Glance

Gemini 3.1 Flash-Lite Preview

• Input pricing: $0.25/M tokens
• Output pricing: $1.50/M tokens
• Context window: 1,000,000 tokens
• Max output: 8,192 tokens

Watch out for

• Higher input cost than Grok Code Fast 1

Grok Code Fast 1

• Input pricing: $0.20/M tokens
• Output pricing: $1.50/M tokens
• Context window: 256,000 tokens
• Max output: 32,768 tokens

Watch out for

• Smaller context window than Gemini 3.1 Flash-Lite Preview

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

Gemini 3.1 Flash-Lite Preview (Google)

Cost Calculator

Provider

Model

Input Tokens

Output Tokens

Requests/Day

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Grok Code Fast 1 (xAI)

Cost Calculator

Provider

Model

Input Tokens

Output Tokens

Requests/Day

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Start using Gemini 3.1 Flash-Lite Preview today

Start using Grok Code Fast 1 today

Frequently Asked Questions

Which is cheaper, Gemini 3.1 Flash-Lite Preview or Grok Code Fast 1?▼

Grok Code Fast 1 is cheaper for input tokens at $0.20 per million tokens vs $0.25 for Gemini 3.1 Flash-Lite Preview — that's 20% savings on input costs.

What is the context window difference between Gemini 3.1 Flash-Lite Preview and Grok Code Fast 1?▼

Gemini 3.1 Flash-Lite Preview supports 1,000,000 tokens while Grok Code Fast 1 supports 256,000 tokens — a difference of 744,000 tokens in favor of Gemini 3.1 Flash-Lite Preview.

Which model is better for AI Chatbot?▼

Both models support text. For ai chatbot, Grok Code Fast 1 is the lower-cost option, while Gemini 3.1 Flash-Lite Preview offers a larger context window (1,000,000 vs 256,000 tokens). Choose Grok Code Fast 1 for budget sensitivity or Gemini 3.1 Flash-Lite Preview for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, Gemini 3.1 Flash-Lite Preview costs about $3.00/month and Grok Code Fast 1 costs about $2.85/month. Overall, Grok Code Fast 1 has lower combined input + output rates ($0.20 in, $1.50 out) vs Gemini 3.1 Flash-Lite Preview.

Where can I compare Google and xAI API pricing beyond this model matchup?▼

See the Google vs xAI provider comparison page for lineup-level averages, then review each model page for exact per-token rates.