Is Claude Fable 5 still available to use?

Yes, but it's now considered a legacy model. Anthropic recommends migrating to Claude Fable 5.1, though Fable 5 remains accessible via the API at its original $10/$50 per million token pricing for existing integrations.

Why is Claude Haiku 5.5 so much cheaper than Fable 5?

Haiku 5.5 is built as a fast, lightweight model for high-volume tasks, while Fable 5 targets deep reasoning and frontier-tier performance. That tier difference explains the 100x price gap on both input and output tokens.

Does Haiku 5.5's pricing ever change?

Yes — Haiku 5.5 uses tiered pricing based on prompt length. The $0.10/$0.50 rate applies to prompts up to 100,000 tokens; beyond that threshold, both input and output rates jump five-fold to $0.50/$2.50 per million tokens.

Which model is cheaper for output-heavy workloads?

Claude Haiku 5.5 is dramatically cheaper for output-heavy workloads, charging $0.50 per million output tokens versus Fable 5's $50 — a 100x difference that makes Haiku 5.5 the clear choice unless you specifically need Fable 5's deeper reasoning capability.

HEAD-TO-HEAD · CROSS-TIER · VERIFIED OCTOBER 21, 2026

Claude Fable 5 vs Claude Haiku 5.5 — which is actually cheaper?

Claude Fable 5 and Claude Haiku 5.5 share Anthropic's 1M-token context window, but that's where the similarity ends — Fable 5 costs 100x more per input token and output token than Haiku 5.5, making this one of the widest price gaps in the current Claude lineup.

Spec	Claude Fable 5	Claude Haiku 5.5
Input / 1M tokens	$10.00	$0.10
Output / 1M tokens	$50.00	$0.50
Context window	1M	1M

The output price gap

The output-token gap is the real story here: Claude Fable 5 charges $50 per million output tokens versus just $0.50 per million for Claude Haiku 5.5 — a flat 100x multiplier. Since output tokens are typically the more expensive side of any workload, this gap dominates total cost for generation-heavy use cases like long-form writing, code generation, or detailed reasoning chains, where Fable 5's premium pricing adds up fast even on moderate volumes.

Context window

Both models ship with a 1M-token context window and a 128K max output ceiling, so neither has an advantage on raw capacity. Note that Haiku 5.5 uses a two-tier pricing structure where prompts exceeding 100K tokens jump to $0.50/$2.50 per million — a detail worth flagging for anyone running consistently long-context jobs on Haiku, since it narrows (but doesn't erase) the cost gap versus Fable 5.

Worked example

At 100M input tokens and 30M output tokens in a month: Claude Fable 5 costs (100 × $10) + (30 × $50) = $1,000 + $1,500 = $2,500. Claude Haiku 5.5 costs (100 × $0.1) + (30 × $0.5) = $10 + $15 = $25. That's a 100x cost difference for identical token volumes, assuming Haiku 5.5 stays under its 100K-token-per-prompt pricing tier.

Prices from the LLM Price Watch daily tracker, 2026-10-21. Prices change; use the calculator with your own usage for an exact comparison, or see the full price table for every tracked model.