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Claude Mythos 5 vs Claude Opus 4.8 — Premium vs Flagship Pricing
Opus 4.8 is half the price of Mythos 5 — both have 1M context. Mythos 5 specializes in creative tasks, Opus 4.8 is the cost-effective general-purpose flagship.
Pricing data verified: Jun 28, 2026
All Premium Models Compared
The premium AI models from major providers, ranked by input price.
| Model | Provider | Tier | Input (per 1M) | Output (per 1M) | Context |
|---|---|---|---|---|---|
| Claude Opus 4.8 | Anthropic | Premium | $5.00 | $25.00 | 1M |
| Claude Mythos 5 | Anthropic | Premium | $10.00 | $50.00 | 1M |
| Claude Fable 5 | Anthropic | Premium | $10.00 | $50.00 | 1M |
| GPT-5.5 | OpenAI | Premium | $5.00 | $30.00 | 1.05M |
| Gemini 3.1 Pro | Mid | $2.00 | $12.00 | 1M |
Calculate Your Exact Costs
See how Opus 4.8's 50% price advantage adds up for your specific usage.
Which Should You Choose?
Creative Writing
Blog posts, marketing copy, stories, creative content generation, brand voice development.
General-Purpose AI
Chatbots, assistants, everyday tasks, mixed workloads, broad AI applications.
Code Generation
Writing code, debugging, architecture decisions, code review, technical implementation.
Marketing Content
Ad copy, email campaigns, social media content, brand storytelling.
Cost-Sensitive Production
High-volume APIs, production workloads, budget-conscious teams, startup MVPs.
Use Both Together
Route creative tasks to Mythos 5, general tasks to Opus 4.8 for optimal cost and quality.
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Frequently Asked Questions
Is Claude Mythos 5 or Claude Opus 4.8 cheaper?
Claude Opus 4.8 is 50% cheaper. It costs $5.00 input and $25.00 output per 1M tokens, while Mythos 5 costs $10.00 input and $50.00 output. Both have the same 1M token context window.
What's the difference between Claude Mythos 5 and Claude Opus 4.8?
Mythos 5 is Anthropic's premium creative model at $10/$50 per 1M tokens, optimized for creative writing, narrative reasoning, and nuanced analysis. Opus 4.8 is Anthropic's general-purpose flagship at $5/$25 per 1M tokens — half the price — with 1M context and strong all-around performance. Choose Mythos 5 for creative tasks, Opus 4.8 for cost-effective general use.
Why would I pay more for Mythos 5 when Opus 4.8 is half the price?
Mythos 5's premium pricing reflects its specialized training for creative and narrative tasks. If your workload involves heavy creative writing, marketing copy, storytelling, or nuanced narrative analysis, Mythos 5 produces higher-quality output for those tasks. For general-purpose coding, analysis, and everyday AI tasks, Opus 4.8 at half the price is the smarter choice.
Do both models have the same context window?
Yes. Both Claude Mythos 5 and Claude Opus 4.8 have a 1 million token context window, so there's no advantage for either model in terms of context size. The choice comes down to capability specialization vs cost.
Which is better for coding: Claude Mythos 5 or Opus 4.8?
Claude Opus 4.8 is the better choice for coding at half the price. It's a strong general-purpose model that handles code generation, debugging, and architecture work well. Mythos 5 can code too, but its strength is creative and narrative tasks — you'd be paying a 2x premium for a model specialized in areas that aren't code.
How much can I save by choosing Opus 4.8 over Mythos 5?
You save 50% on every API call. For example, with 5,000 requests/day at 2,000 input and 500 output tokens, Mythos 5 costs $6,750/month while Opus 4.8 costs $3,375/month — a savings of $3,375/month or $40,500/year. The savings scale linearly with your usage.
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