Standard Compute
Model comparison 2026

Claude Fable 5.1 vs DeepSeek V4 Pro

Claude Fable 5.1
Anthropic · Frontier · Proprietary
$22/1M · 1M ctx
DeepSeek V4 Pro
DeepSeek · Frontier · Open weights
$0.57/1M · 1.0M ctx

Community vote

Pick a winner in each dimension. You can change your vote any time.

Output Quality
Correctness and depth of what it produces
Agentic Ability
Tool calls, instruction-following, and multi-step tasks
Speed
Tokens per second and time-to-first-token
Value for money
How much capability you get per dollar
Reliability
Consistent results: fewer refusals, loops and format breaks

Specs and pricing side by side

Spec
Fable 5.1
DeepSeek V4 Pro
Maker
Anthropic
DeepSeek
Blended price / 1M
$22
$0.57
Input / output
$10 in · $50 out / 1M tokens
$0.44 in · $0.87 out / 1M tokens
Context window
1M
1.0M
Open weights
No
Yes
Tool use
Yes
Yes
Reasoning
Yes
Yes
Output Quality
9.7
8.9
Agentic Ability
9.7
9.0
Speed
6.7
7.4
Value for money
6.9
9.4
Reliability
9.6
8.8

Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).

Verdict: Fable 5.1 or DeepSeek V4 Pro?

Updated 2026-10-13

Choose Claude Fable 5.1 if you want teams already standardized on Fable that want the newest premium Claude. Choose DeepSeek V4 Pro if you want cost-conscious agents that still want top-tier output.

In our editorial scoring, Claude Fable 5.1 leads in 3 of five dimensions (output quality, agentic ability and reliability), while DeepSeek V4 Pro leads in 2. On price, Claude Fable 5.1 runs about $22 per 1M tokens (blended) and is proprietary; DeepSeek V4 Pro is about $0.57 and open-weight.

Where Fable 5.1 falls short
  • Opus 5.5 scores higher on Artificial Analysis and Terminal-Bench 4.0 at less than half the price
  • Slow: about 67 output tokens/s at max effort
Full Fable 5.1 breakdown →
Where DeepSeek V4 Pro falls short
  • Tool-use polish behind the top closed models
  • Hosted throughput varies by provider
Full DeepSeek V4 Pro breakdown →

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