ColinBuilds · Official Anthropic API pricing
Claude Fable 5
- Input / 1M
- $10.00
- Output / 1M
- $50.00
- Official Anthropic context window
- 1,000,000 tokens
Anthropic Claude API claude-fable-5 official API pricing; input $10/1M tokens, output $50/1M tokens. Prompt cache: 5-minute writes $12.50/1M, 1-hour writes $20/1M, cache hits $1/1M. · as of August 25, 2026
Compare models
Same per-1M input/output rates as above. Enter your monthly token volumes to compare bills.
Claude Fable 5
- Input: 1M × $10.00 = $10.00
- Output: 1M × $50.00 = $50.00
- Total
- $60.00
GPT-4o
- Input: 1M × $2.50 = $2.50
- Output: 1M × $10.00 = $10.00
- Total
- $12.50
Difference
$47.50
Claude Fable 5 costs $47.50 more than GPT-4o.
Popular comparisons
37 total featuring Claude Fable 5.
Claude Fable 5 is Anthropic’s highest-capability current Claude API model, positioned for long-running agents and work where the extra cost over Opus 5 is justified.
What this model is
Anthropic lists the exact Claude API ID and alias as claude-fable-5. The models overview describes Fable 5 as next-generation intelligence for long-running agents, and says to use it for the highest available capability in the current lineup.
The same overview lists Claude Fable 5 with text and image input, text output, multilingual capability, vision support, adaptive thinking that is always on, a 1 million token context window, and a 128,000 token maximum output. Default effort is listed as high.
Claude Mythos 5 appears on Anthropic’s pricing table at the same $10/$50 token rates, but Anthropic marks Mythos 5 as limited availability. This page covers the generally listed Fable 5 API ID only.
Pricing notes
Anthropic’s official pricing page lists Claude Fable 5 at $10 per 1M input tokens and $50 per 1M output tokens. The calculator on this page uses those first-party Claude API rates.
The same pricing table lists prompt-cache rates for Claude Fable 5: 5-minute cache writes at $12.50 per 1M tokens, 1-hour cache writes at $20 per 1M tokens, and cache hits and refreshes at $1 per 1M tokens. Batch API discounts, cloud platforms, data residency, and regional endpoint premiums are separate.
Benchmarks and specs
Anthropic’s models overview lists Claude Fable 5 with a 1 million token context window, a 128,000 token maximum output, a reliable knowledge cutoff of January 2026, and a training data cutoff of January 2026. Retirement is listed as not sooner than June 9, 2027.
This page does not show a parameter count or public benchmark score. Those numbers should only be shown when exact public sources are matched to claude-fable-5 specifically.
Best fit
Claude Fable 5 is best when the job needs Anthropic’s current top Claude API tier: long-running agents, the hardest reasoning or coding work, and quality-first enterprise tasks where Opus 5 is not enough.
For a cheaper default, use Sonnet 5. For complex agentic coding at the Opus price point, use Opus 5.