Claude Mythos 5.1 vs o1
Pricing verdict: Claude Mythos 5.1 vs o1: Claude Mythos 5.1 is cheaper for input-heavy usage ($10.00/M vs $15.00/M input tokens), while Claude Mythos 5.1 is better for long-context tasks (1,000,000 tokens).
Direct answer: choose Claude Mythos 5.1 for lower token spend and choose Claude Mythos 5.1 when your workload needs longer context.
Compare API pricing, input and output token costs, context windows, and monthly estimates on one page so you can pick the right model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Mythos 5.1
o1
Cost Differences
o1 costs more than Claude Mythos 5.1
Quick Recommendation
Winner for direct API pricing: Claude Mythos 5.1. At the default workload, Claude Mythos 5.1 saves about $30.00/month ($365.00/year) versus o1.
Feature Comparison
| Feature | Claude Mythos 5.1 | o1 |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $10.00/1M tokens | $15.00/1M tokens |
| Output Price | $50.00/1M tokens | $60.00/1M tokens |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Max Output | 128,000 tokens | 65,536 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionreasoningcode | textreasoning |
| Release Date | 9/1/2026 | 9/12/2024 |
Claude Mythos 5.1 vs o1: Which Should You Choose?
Choosing between Claude Mythos 5.1 and o1 depends on your priorities: cost efficiency, context length, or raw capability. Claude Mythos 5.1 is the more affordable option at $10.00/1M input tokens — 33% cheaper than o1. Meanwhile, Claude Mythos 5.1 offers a significantly larger context window at 1,000,000 tokens vs 200,000 for o1.
These models come from different providers — Anthropic and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude Mythos 5.1 is a flagship model while o1 is reasoning. This means they're optimized for different workloads. Claude Mythos 5.1 is built for complex tasks that require deeper reasoning, while o1 offers better value for routine operations.
Output costs matter too. Claude Mythos 5.1 charges $50.00/1M output tokens vs $60.00 for o1. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Claude Mythos 5.1 has the edge here at $50.00/1M output tokens.
Multimodal capabilities: Claude Mythos 5.1 supports vision (image inputs) while o1 is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Claude Mythos 5.1 when:
- • Budget is a primary concern
- • You need a larger context window (1,000,000 tokens)
- • You need more capabilities (vision, code)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using Anthropic's API ecosystem
Choose o1 when:
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Claude Mythos 5.1
- • Input pricing: $10.00/M tokens
- • Output pricing: $50.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Trade-offs are minor in this matchup.
o1
- • Input pricing: $15.00/M tokens
- • Output pricing: $60.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 65,536 tokens
Watch out for
- • Higher input cost than Claude Mythos 5.1
- • Higher output cost than Claude Mythos 5.1
- • Smaller context window than Claude Mythos 5.1
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Mythos 5.1 (Anthropic)
o1 (OpenAI)
Start using Claude Mythos 5.1 today
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Claude Mythos 5.1 or o1?▼
What is the context window difference between Claude Mythos 5.1 and o1?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Anthropic and OpenAI API pricing beyond this model matchup?▼
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