Claude Fable 5 vs o1 Pro
Pricing verdict: Claude Fable 5 vs o1 Pro: Claude Fable 5 is cheaper for input-heavy usage ($10.00/M vs $150.00/M input tokens), while Claude Fable 5 is better for long-context tasks (1,000,000 tokens).
Direct answer: choose Claude Fable 5 for lower token spend and choose Claude Fable 5 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 Fable 5
o1 Pro
Cost Differences
o1 Pro costs more than Claude Fable 5
Quick Recommendation
Winner for direct API pricing: Claude Fable 5. At the default workload, Claude Fable 5 saves about $1,245.00/month ($15,147.50/year) versus o1 Pro.
Feature Comparison
| Feature | Claude Fable 5 | o1 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $10.00/1M tokens | $150.00/1M tokens |
| Output Price | $50.00/1M tokens | $600.00/1M tokens |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Max Output | 128,000 tokens | 100,000 tokens |
| Category | flagship | flagship |
| Capabilities | textvisionreasoningcode | textvisioncodereasoning |
| Release Date | 6/9/2026 | 12/17/2024 |
Claude Fable 5 vs o1 Pro: Which Should You Choose?
Choosing between Claude Fable 5 and o1 Pro depends on your priorities: cost efficiency, context length, or raw capability. Claude Fable 5 is the more affordable option at $10.00/1M input tokens — 93% cheaper than o1 Pro. Meanwhile, Claude Fable 5 offers a significantly larger context window at 1,000,000 tokens vs 200,000 for o1 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.
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: Claude Fable 5 would save you roughly $124,500.00/month compared to o1 Pro. For startups and indie developers, that difference can be significant.
Output costs matter too. Claude Fable 5 charges $50.00/1M output tokens vs $600.00 for o1 Pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Claude Fable 5 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 Fable 5 when:
- • Budget is a primary concern
- • You need a larger context window (1,000,000 tokens)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using Anthropic's API ecosystem
Choose o1 Pro when:
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Claude Fable 5
- • 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 Pro
- • Input pricing: $150.00/M tokens
- • Output pricing: $600.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 100,000 tokens
Watch out for
- • Higher input cost than Claude Fable 5
- • Higher output cost than Claude Fable 5
- • Smaller context window than Claude Fable 5
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Fable 5 (Anthropic)
o1 Pro (OpenAI)
Start using Claude Fable 5 today
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Claude Fable 5 or o1 Pro?▼
What is the context window difference between Claude Fable 5 and o1 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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