What's the difference between Claude Opus 5 and Fable 5?

Claude Fable 5 is Anthropic's peak-capability flagship at $10/$50 per MTok. Claude Opus 5 (July 24, 2026) delivers near-Fable-5 intelligence at $5/$25 — exactly half the price — and lands within about 0.5% of Fable 5 on CursorBench. Fable 5 still edges some peak coding benchmarks; Opus 5 wins on value and is the new default.

Is Claude Opus 5 as good as Fable 5?

Nearly. Opus 5 performs within ~0.5% of Fable 5 on CursorBench and matches or beats it on several agentic-coding and computer-use tasks, at half the cost. Fable 5 retains a small lead on raw peak benchmarks (~95% SWE-bench Verified), so it's worth it only when you need the absolute ceiling regardless of price.

Which is cheaper, Opus 5 or Fable 5?

Opus 5 is exactly half the price: $5 input / $25 output per million tokens vs Fable 5's $10/$50. For most workloads Opus 5 is the better value; reserve Fable 5 for the hardest tasks where a few benchmark points justify 2x the cost.

Quick Answer

Claude Opus 5 vs Fable 5: Which to Use in 2026

Published: July 27, 2026

The Short Answer

Use Claude Opus 5 by default; reach for Fable 5 only at the ceiling. Opus 5 (July 24, 2026) delivers near-Fable-5 intelligence at half the price — $5/$25 vs $10/$50 — landing within ~0.5% of Fable 5 on CursorBench. Fable 5 keeps a slim lead on peak benchmarks, which only matters when cost is no object.

Head-to-Head

Dimension	Claude Opus 5	Claude Fable 5
Role	New default Opus	Peak-capability flagship
Price (in/out)	$5 / $25	$10 / $50
Launched	July 24, 2026	July 1, 2026 (returned)
Context	1M tokens	Large context
CursorBench	within ~0.5% of Fable 5	Top
SWE-bench Verified	High	~95% (peak)
Agentic coding / computer use	Matches or beats Fable 5 on several	Strong
Subscription access	Pro / Max / Team / Enterprise	Max / Team-Premium only (50% weekly cap)
Best when	Value + near-frontier quality	Absolute ceiling, cost-no-object

When Fable 5 Is Still Worth It

The task is genuinely at the frontier and a few benchmark points change the outcome.
You’re doing peak-difficulty coding where ~95% SWE-bench Verified matters.
Budget is not the constraint and you want the single best answer per call.

When Opus 5 Wins

Almost everything else. Multi-file refactors, long-horizon agents, document analysis, and daily coding all get near-flagship quality at half the cost.
Subscription reach — Opus 5 is available to Pro/Max/Team/Enterprise, while Fable 5 is gated to Max/Team-Premium with a 50% weekly cap.
You want to run more calls per dollar for the same quality tier.

The Practical Rule

Set Opus 5 as your default and add Fable 5 as an escalation for the small slice of tasks that fail Opus 5. That captures ~all of the quality at roughly half the blended cost.

Sources

Anthropic — Claude Opus 5 (July 24, 2026): anthropic.com/news/claude-opus-5
Claude docs — models overview: platform.claude.com/docs/en/about-claude/models
OpenRouter — Opus 5 pricing: openrouter.ai/anthropic/claude-opus-5