Claude Mythos 5.1 vs GPT-4 Turbo
Pricing verdict: Claude Mythos 5.1 vs GPT-4 Turbo: input pricing is tied at $10.00/M, GPT-4 Turbo is cheaper for output-heavy usage ($30.00/M output), and Claude Mythos 5.1 is better for long-context tasks (1,000,000 tokens).
Direct answer: input pricing is tied. Choose GPT-4 Turbo for cheaper output 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-4 Turbo
Cost Differences
GPT-4 Turbo costs less than Claude Mythos 5.1
Quick Recommendation
Winner for direct API pricing: GPT-4 Turbo. At the default workload, GPT-4 Turbo saves about $30.00/month ($365.00/year) versus Claude Mythos 5.1.
Feature Comparison
| Feature | Claude Mythos 5.1 | GPT-4 Turbo |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $10.00/1M tokens | $10.00/1M tokens |
| Output Price | $50.00/1M tokens | $30.00/1M tokens |
| Context Window | 1,000,000 tokens | 128,000 tokens |
| Max Output | 128,000 tokens | 4,096 tokens |
| Category | flagship | flagship |
| Capabilities | textvisionreasoningcode | textvisioncode |
| Release Date | 9/1/2026 | 4/9/2024 |
Claude Mythos 5.1 vs GPT-4 Turbo: Which Should You Choose?
Choosing between Claude Mythos 5.1 and GPT-4 Turbo depends on your priorities: cost efficiency, context length, or raw capability. Both models charge $10.00/1M input tokens, but GPT-4 Turbo is cheaper on output at $30.00/1M. Meanwhile, Claude Mythos 5.1 offers a significantly larger context window at 1,000,000 tokens vs 128,000 for GPT-4 Turbo.
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.
Both models are in the flagship category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: GPT-4 Turbo would save you roughly $3,000.00/month compared to Claude Mythos 5.1. For startups and indie developers, that difference can be significant.
Output costs matter too. Claude Mythos 5.1 charges $50.00/1M output tokens vs $30.00 for GPT-4 Turbo. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-4 Turbo has the edge here at $30.00/1M 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:
- • You need a larger context window (1,000,000 tokens)
- • You need more capabilities (reasoning)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using Anthropic's API ecosystem
Choose GPT-4 Turbo 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
- • Higher output cost than GPT-4 Turbo
GPT-4 Turbo
- • Input pricing: $10.00/M tokens
- • Output pricing: $30.00/M tokens
- • Context window: 128,000 tokens
- • Max output: 4,096 tokens
Watch out for
- • 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)
GPT-4 Turbo (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 GPT-4 Turbo?▼
What is the context window difference between Claude Mythos 5.1 and GPT-4 Turbo?▼
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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