Anthropic
Claude Opus 4.8
$0.00
per month
Input cost
Output cost
Cost per request
Requests/month
Google
Gemini 3 Flash
Cheaper Choice
$0.00
per month
Input cost
Output cost
Cost per request
Requests/month

Other Models to Consider

Claude Sonnet 4.6
Anthropic
$3.00 / $15.00 per 1M
1M context
GPT-5
OpenAI
$1.25 / $10.00 per 1M
272K context
GPT-5.5
OpenAI
$5.00 / $30.00 per 1M
1.05M context

Which Model for Which Use Case?

Cost-Sensitive High Volume

Gemini 3 Flash's $0.50/M input and $3.00/M output make it 88-90% cheaper for high-volume tasks. At 1M requests/day, you'd save $855/mo vs Opus.

Cheapest: Gemini 3 Flash

Complex Reasoning

Claude Opus 4.8 excels at complex reasoning, nuanced analysis, and creative tasks. If you need the highest quality outputs, Opus's training gives it a significant edge.

Best quality: Claude Opus 4.8

Same Context Window

Both models have 1M context windows. For long documents or extended conversations, either model handles the same amount of context — but Gemini does it at 90% lower cost.

Same context, lower cost: Gemini 3 Flash

Creative Writing & Analysis

For tasks requiring creative writing, nuanced analysis, or deep understanding of complex topics, Opus 4.8's superior reasoning capabilities justify the premium for quality-critical applications.

Better for creative: Claude Opus 4.8

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Frequently Asked Questions

Is Gemini 3 Flash cheaper than Claude Opus 4.8?

Yes. Gemini 3 Flash costs $0.50/M input and $3.00/M output — 90% cheaper on input and 88% cheaper on output than Claude Opus 4.8's $5.00/M input and $25.00/M output.

When would I choose Claude Opus 4.8 over Gemini 3 Flash?

Choose Claude Opus 4.8 for complex reasoning, nuanced analysis, creative writing, and tasks requiring the highest quality outputs. Opus is Anthropic's most capable model with superior performance on complex benchmarks.

How much can I save by switching from Opus to Gemini Flash?

At 1M requests/day with 1K input and 500 output tokens, you'd save approximately $855/month by switching from Opus 4.8 ($900/mo) to Gemini 3 Flash ($45/mo) — a 95% cost reduction.

Is Gemini 3 Flash good enough to replace Opus?

For many tasks like classification, extraction, summarization, and simple generation, Gemini 3 Flash delivers solid quality at 88-90% lower cost. For complex reasoning or tasks requiring the highest quality, Opus 4.8 may still be worth the premium.

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