Claude Fable 5.1 vs DeepSeek V4 Pro
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
DeepSeek V4 Pro is 90.1% cheaper on blended cost ($1.98 vs $20.00/Mtok) — note: different model classes (mid tier vs flagship)
| Specification |
by Anthropic
|
by DeepSeek
4 providers:
DeepSeek $1.32/$3.96
Fireworks $1.74/$3.48
Together $1.74/$3.48
DeepInfra $1.30/$2.60
|
|---|---|---|
| Overview | ||
| Status | Current flagship | Current mid tier |
| Released | Sep 1, 2026 | Apr 24, 2026 |
| Pricing per million tokens | ||
| Input | $10.00/Mtok | $1.32/Mtok |
| Output | $50.00/Mtok | $3.96/Mtok |
| Blended avg | $20.00/Mtok | $1.98/Mtok |
| Cached input | $0.250/Mtok | $0.044/Mtok |
| Price basis | Cache hits and refreshes on Claude Fable 5.1 (and Claude Mythos 5.1) are priced at 0.025x the base input price — $0.25 per 1M tokens — where every other Claude model uses the standard 0.1x multiplier. Base $10/$50 per 1M tokens; Batch API $5/$25. Verified 2026-09-01 against platform.claude.com/docs/en/about-claude/pricing. | DeepSeek bills this model at TWO rates depending on the hour. The tracked figure is the PEAK rate: $1.32 input / $0.044 cached input / $3.96 output per 1M tokens. Off-peak is exactly half: $0.66 / $0.022 / $1.98. Peak hours are 01:00-04:00 and 06:00-10:00 UTC; every other hour is off-peak. Peak is the headline here because DeepSeek defines off-peak as half of peak rather than the other way round, so peak is the list rate, and because a caller who does not schedule around the clock needs the published number to be a ceiling rather than a floor. Halve it for a workload that runs entirely outside those seven hours. Until 16:00 UTC on 2026-08-16 this model billed a single flat $0.435 / $0.003625 / $0.87. |
| Specifications | ||
| Context window | 1M tokens | 1M tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimage
|
text
|
| Benchmarks source: Vellum LLM Leaderboard | ||
| Avg benchmark score | 54.2 | 73.5 |
| Perf / dollar | 2.7 | 37.1 |
| Humanity's Last Exam | 65 | 48.2 |
| GPQA Diamond | — | 90.1 |
| SWE-Bench Verified | — | 80.6 vendor |
| Terminal-Bench 2.1 | 55.8 | — |
| LiveCodeBench | — | 93.5 |
| MCP Atlas | — | 73.6 |
| BrowseComp | — | 83.4 |
| OSWorld-Verified | 41.7 | — |
| ARC-AGI 2 | — | 30 |
| AIME 2025 | — | 75 |
| MMMLU | — | 82 |
| BFCL | — | 72 |
| HumanEval | — | 80.6 |
| MATH 500 | — | 80 |
| AutoBench | 31.4 | — |
| Independent composite scores each on its own scale — not part of the average above | ||
| AA Intelligence Index | 65.7 | 53.2 |
| AA Agentic Index | 61.3 | 49.6 |
| AA-Omniscience Index (−100–100) | 43.5 | 0.8 |
| GDPval-AA v2 | 1853 ELO | 1576.8 ELO |
| LMSYS Chatbot Arena | — | 1457.8 ELO |
| Providers | ||
| Available from |
Anthropic — $10.00/$50.00/Mtok
|
DeepSeek — $1.32/$3.96/Mtok
Fireworks — $1.74/$3.48/Mtok
Together — $1.74/$3.48/Mtok
DeepInfra — $1.30/$2.60/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Claude Fable 5.1 | DeepSeek V4 Pro | Savings |
|---|---|---|---|
| 1M tokens | $20 | $1.98 | $18.02 (90.1%) |
| 10M tokens | $200 | $19.8 | $180.2 (90.1%) |
| 100M tokens | $2000 | $198 | $1802 (90.1%) |
| 1000M tokens | $20000 | $1980 | $18020 (90.1%) |
When to pick which
distilled from the pricing and spec data above
Pick Claude Fable 5.1 if…
- your workload re-reads context (agents, RAG, long chats): cached input costs $0.250/Mtok — 98% off its list input price
Pick DeepSeek V4 Pro if…
- cost dominates: $1.98/Mtok blended vs $20.00 — 90.1% less on the same 50/50 token mix
- raw capability matters more than price: 73.5 vs 54.2 average benchmark score
- provider flexibility: available from 4 providers, so you can price-shop hosts or fail over
Price movement
recorded changes since we began tracking each model · last checked Sep 1, 2026| Model | Changes | Latest move | Old → new $/M |
|---|---|---|---|
| Claude Fable 5.1 | 0 | — no move | Stable since we began tracking — no change recorded |
| DeepSeek V4 Pro | 1 | price rise on Aug 16, 2026 | $0.435/$0.87 → $1.32/$3.96/Mtok |
Only DeepSeek V4 Pro has changed price since we began tracking; Claude Fable 5.1 has held steady.
See all recent price moves →
MODELPRICEWATCH.COM · 2026-09-01
Try DeepSeek V4 Pro on DeepSeek
The cheaper option here — DeepSeek V4 Pro costs $1.98/Mtok blended on DeepSeek.
Summary
Claude Fable 5.1 by Anthropic costs $10.00/Mtok input and $50.00/Mtok output, with a 1M-token context window. It supports text, image input.
DeepSeek V4 Pro by DeepSeek costs $1.32/Mtok input and $3.96/Mtok output, with a 1M-token context window. It supports text input and is available from 4 providers.
On a blended cost basis, DeepSeek V4 Pro is 90.1% cheaper than Claude Fable 5.1.
On benchmarks, DeepSeek V4 Pro scores higher (73.5 vs 54.2) on average. In terms of value, DeepSeek V4 Pro has better performance per dollar (37.1 vs 2.7).
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.
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