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Claude Mythos 5 vs Gemini 3.1 Pro — Premium vs Mid-Tier
Gemini 3.1 Pro is 80% cheaper on input ($2 vs $10). Compare Anthropic's premium research model with Google's versatile mid-tier offering.
Pricing data verified: Jul 3, 2026
Premium vs Mid-Tier Models
How Anthropic's premium research model compares to Google's mid-tier workhorse.
| Model | Provider | Tier | Input (per 1M) | Output (per 1M) | Context |
|---|---|---|---|---|---|
| Gemini 3.1 Pro | Mid | $2.00 | $12.00 | 1M | |
| Claude Sonnet 5 | Anthropic | Mid | $3.00 | $15.00 | 1M |
| Claude Opus 4.8 | Anthropic | Premium | $5.00 | $25.00 | 1M |
| Claude Mythos 5 | Anthropic | Premium | $10.00 | $50.00 | 1M |
Calculate Your Exact Costs
See the cost difference between premium Mythos 5 and mid-tier Gemini 3.1 Pro for your workload.
Which Should You Choose?
Complex Research
Deep research, literature review, multi-step reasoning.
General-Purpose AI
Summarization, Q&A, analysis, coding, everyday tasks.
Enterprise Deployment
Production workloads at scale with cost sensitivity.
Data Analysis
Processing data, generating insights, report writing.
Code Generation
Writing code, debugging, architecture decisions.
Budget-Conscious Teams
Startups and small teams watching every dollar.
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Frequently Asked Questions
Is Claude Mythos 5 or Gemini 3.1 Pro cheaper?
Gemini 3.1 Pro is much cheaper. It costs $2.00/$12.00 per 1M tokens while Claude Mythos 5 costs $10.00/$50.00. That's 80% cheaper on input and 76% cheaper on output. At 1M tokens/month, Gemini 3.1 Pro costs $42 vs Mythos 5's $180.
What is Claude Mythos 5 used for?
Claude Mythos 5 at $10/$50 is Anthropic's premium research and analysis model, designed for complex reasoning, deep analysis, multi-step research, and tasks requiring maximum intellectual capability. It's 2x more expensive than Opus 4.8 and 5x more than Gemini 3.1 Pro.
When should I use Mythos 5 vs Gemini 3.1 Pro?
Mythos 5 ($10/$50) is for specialized research tasks requiring premium reasoning capability — complex analysis, deep research, multi-step reasoning. Gemini 3.1 Pro ($2/$12) handles 90% of general AI tasks at 80% lower cost. Most users should start with Gemini 3.1 Pro and only use Mythos 5 for research where maximum capability is critical.
How does Mythos 5 compare to Opus 4.8?
Mythos 5 ($10/$50) costs 2x more than Opus 4.8 ($5/$25). Mythos 5 is designed for the most complex reasoning tasks while Opus 4.8 is Anthropic's general-purpose premium model. For most premium tasks, Opus 4.8 offers better value. Choose Mythos 5 specifically for the most demanding research and analysis workloads.
Can I use Mythos 5 and Gemini 3.1 Pro together?
Yes! A cost-effective pattern: use Gemini 3.1 Pro ($2/$12) for 90% of tasks (analysis, coding, general queries) and route only the most complex research and reasoning tasks to Mythos 5 ($10/$50). This gives you premium capability where needed while keeping costs 80% lower for standard workloads.
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