LLMCost

Anthropic: Claude Fable 5 vs OpenAI: GPT-4o

On input price, OpenAI: GPT-4o is ~4.0× cheaper. Verified 2026-10-21.

Anthropic: Claude Fable 5 $10.00/$50.00vsOpenAI: GPT-4o $2.50/$10.00

Verdict

On blended price (3:1 input:output), OpenAI: GPT-4o is ~4.6× cheaper ($2.50/$10.00 vs $10.00/$50.00 per 1M tokens). Anthropic: Claude Fable 5 generates comparable output.

Pricing

Per-million-token list prices, verified 2026-10-21. Green marks the better value.

MetricAnthropic: Claude Fable 5OpenAI: GPT-4o
Input / 1M$10.00$2.50
Output / 1M$50.00$10.00
Cache read / 1M$1.00$1.25
Blended (3:1)$20.00/1M$4.38/1M
Estimated monthly costAnthropic: Claude Fable 5OpenAI: GPT-4o
Chatbot10,000 reqs · 800/400 tok$280.00$60.00
Coding agent5,000 reqs · 8000/2000 tok$900.00$200.00
RAG pipeline30,000 reqs · 4000/500 tok$1950.00$450.00

Plug in your own numbers in the calculator, or paste a real bill into the Bill Shredder.

Specifications & capabilities

MetricAnthropic: Claude Fable 5OpenAI: GPT-4o
Context window1M128K
Max output128K16K
Vision input✓✓
Tool calling✓✓
Reasoning✓–

Quality

Intelligence Index by Artificial Analysis (independent evaluations, 0–100).

Verified intelligence scores aren't available for both models yet. See the full leaderboard.

Performance

Measured by Artificial Analysis on live endpoints.

Output speed — higher is better
Anthropic: Claude Fable 590 tok/s
OpenAI: GPT-4o90 tok/s
Latency (TTFT) — lower is better
Anthropic: Claude Fable 51,100 ms
OpenAI: GPT-4o1,100 ms
MetricAnthropic: Claude Fable 5OpenAI: GPT-4o
Cost per task$0.000022$0.000012

Provider

Infrastructure metrics for the organizations behind these models.

MetricAnthropicOpenAI
Listed endpoints812
Reliability99.8%99.9%
Avg latency520 ms450 ms
Pricing tiersstandard, batchstandard, batch, provisioned

Full details: Anthropic: Claude Fable 5 pricing · OpenAI: GPT-4o pricing