token.app › Compare › Claude Fable 5.1 (batch) vs Beam 1.0 501B A23B

Claude Fable 5.1 (batch) vs Beam 1.0 501B A23B

Beam 1.0 501B A23B is 23× cheaper per token on a blended 3:1 basis. Beam 1.0 501B A23B accepts the larger context window (1.0M).

Head to head
Blended price uses a 3:1 input:output mix
Claude Fable 5.1 (batch)Beam 1.0 501B A23B
ProviderAnthropicReflection
Input $/1M$5.00$0.250
Output $/1M$25.00$1.00
Blended $/1M$10.00$0.438
Context window1M1.0M
Max output128K131K
ReleasedSep 2026Oct 2026
LicenceProprietaryOpen weights
Choose Claude Fable 5.1 (batch) if…
  • No clear advantage on the data we hold.
Choose Beam 1.0 501B A23B if…
  • Costs less per token — $0.438 vs $10.00 blended
  • Larger context window (1.0M)
  • Open weights — self-hostable
  • Newer model (released Oct 2026)
FAQ
Which is better, Claude Fable 5.1 (batch) or Beam 1.0 501B A23B?
We do not hold independently-run benchmark scores covering both Claude Fable 5.1 (batch) and Beam 1.0 501B A23B, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Claude Fable 5.1 (batch) cheaper than Beam 1.0 501B A23B?
Beam 1.0 501B A23B is cheaper: $0.438 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $5.00 vs $0.250. Output alone: $25.00 vs $1.00.
What context windows do Claude Fable 5.1 (batch) and Beam 1.0 501B A23B have?
Claude Fable 5.1 (batch): 1,000,000 tokens. Beam 1.0 501B A23B: 1,048,576 tokens.
Who makes Claude Fable 5.1 (batch) and Beam 1.0 501B A23B?
Claude Fable 5.1 (batch) is made by Anthropic. Beam 1.0 501B A23B is made by Reflection.
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