claude-opus-4-8 vs claude-fable-5

Pricing, Performance & Features Comparison

claude-opus-4-8

Authoranthropic

Context Length1M

Reasoning

Providers1

ReleasedMay 2026

Knowledge Cutoff–

License–

Anthropic’s most capable Opus-tier model, tuned for long-horizon agentic work, knowledge work, and memory.

Input$5

Output$25

Latency (p50)5.1s

Output Limit128K

Function Calling

JSON Mode

InputText, Image

OutputText

anthropic

in$5out$25cache$0.5write$6.3

Latency (24h)

Success Rate (24h)

claude-fable-5

Authoranthropic

Context Length1M

Reasoning

Providers1

ReleasedJun 2026

Knowledge Cutoff–

License–

Anthropic’s most capable widely released model, a tier above Opus. Thinking is always on, sampling parameters are rejected, and requests may return a refusal stop reason.

Input$10

Output$50

Latency (p50)8.1s