Claude Mythos 5.1 vs GPT-5.2 pro
Pricing verdict: Claude Mythos 5.1 vs GPT-5.2 pro: Claude Mythos 5.1 is cheaper for input-heavy usage ($10.00/M vs $21.00/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
GPT-5.2 pro
Cost Differences
GPT-5.2 pro 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 $210.00/month ($2,555.00/year) versus GPT-5.2 pro.
Feature Comparison
| Feature | Claude Mythos 5.1 | GPT-5.2 pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $10.00/1M tokens | $21.00/1M tokens |
| Output Price | $50.00/1M tokens | $168.00/1M tokens |
| Context Window | 1,000,000 tokens | 1,000,000 tokens |
| Max Output | 128,000 tokens | 131,072 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionreasoningcode | textvisionaudiocodereasoning |
| Release Date | 9/1/2026 | 12/11/2025 |
Claude Mythos 5.1 vs GPT-5.2 pro: Which Should You Choose?
Choosing between Claude Mythos 5.1 and GPT-5.2 pro 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 — 52% cheaper than GPT-5.2 pro.
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 GPT-5.2 pro is reasoning. This means they're optimized for different workloads. Claude Mythos 5.1 is built for complex tasks that require deeper reasoning, while GPT-5.2 pro offers better value for routine operations.
Output costs matter too. Claude Mythos 5.1 charges $50.00/1M output tokens vs $168.00 for GPT-5.2 pro. 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: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude Mythos 5.1 when:
- • Budget is a primary concern
- • You're already using Anthropic's API ecosystem
Choose GPT-5.2 pro when:
- • You need more capabilities (audio)
- • You need longer outputs (up to 131,072 tokens)
- • 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.
GPT-5.2 pro
- • Input pricing: $21.00/M tokens
- • Output pricing: $168.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Higher input cost than Claude Mythos 5.1
- • Higher output cost 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)
GPT-5.2 pro (OpenAI)
Start using Claude Mythos 5.1 today
Sign Up for Anthropic →Start using GPT-5.2 pro today
Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Claude Mythos 5.1 or GPT-5.2 pro?▼
What is the context window difference between Claude Mythos 5.1 and GPT-5.2 pro?▼
Which model is better for AI Agent / Agentic Workflows?▼
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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