DeepSeek V4 Pro vs Claude Fable 5.1
Claude Fable 5.1 scores higher on 4 of the 4 benchmarks both models publish. The widest gap is on SWE-bench Pro, where Claude Fable 5.1 leads by 25.8 points. DeepSeek V4 Pro has open weights, so unlike Claude Fable 5.1 you can run it on your own GPU with no per-token fees.
DeepSeek V4 ProDeepSeek · Open weights91.0compositeClaude Fable 5.1Anthropic · Closed API91.2compositeShared benchmarks
Raw published scores; the higher score on each row is highlighted. LMArena Elo is a human-preference vote and is not counted as a win.
- GPQA Diamond90.193.7
V4-Pro (Preview) Max, pass@1GPQA Diamond; AA independent run (Max, Default Fallback)
- Humanity's Last Exam42.760.9
V4-Pro-0813, no toolsHumanity's Last Exam, no tools; max effort
- Humanity's Last Exam (with tools)60.065.0
V4-Pro-0813, with toolsHumanity's Last Exam, with tools; max effort (Opus 5.5 system card lists Fable 5.1 at 65.6%)
- SWE-bench Pro55.481.2
V4-Pro (Preview) Max, resolvedSWE-bench Pro; adaptive thinking max effort; avg of 5 trials
- LMArena Text Elo · not counted14651504
DeepSeek-V4-Pro (High, 20260813), ±7, board dated 2026-10-27LMArena Text, Overall; snapshot Oct 27, 2026; Claude Fable 5.1 (Max); +/-6
Should you pick DeepSeek V4 Pro or Claude Fable 5.1?
Pick DeepSeek V4 Pro if…
- You need to self-host: keep prompts and data on your own GPU, avoid per-token fees, or fine-tune the weights.
- You need fast responses: about 94 tokens per second through APIs, against 71.
- Cost matters: $3.96 per million output tokens against $50.00.
Pick Claude Fable 5.1 if…
- You care most about GPQA Diamond, Humanity's Last Exam, Humanity's Last Exam (with tools), where it scores at least 2 points higher.
- You want a managed API and would rather not run or pay for GPUs yourself.
- People prefer its answers in blind chats: LMArena Elo 1504 against 1465.
Hardware and cost to run
DeepSeek V4 Pro
Even at 4-bit it needs about 1.1 TB (8× H200 (1,128 GB)), well beyond a home workstation, so most people run it on rented multi-GPU servers. Full BF16 precision needs about 3.7 TB (Multiple nodes (over 1.1 TB)).
Claude Fable 5.1
Claude Fable 5.1 is only available through Anthropic's API, so it cannot be self-hosted; it costs $10 per million input tokens and $50 per million output tokens.
Category profile
Category index uses every test each model reports, not only the shared ones.
Specs side by side
| DeepSeek V4 Pro | Claude Fable 5.1 | |
|---|---|---|
| Lab | DeepSeek | Anthropic |
| Weights | Open | API only |
| Released | 2026-08-13 | 2026-09-01 |
| Parameters | 1.6T total, 49B active (MoE) | — |
| Context | 1M | 1M |
| License | MIT | — |
| 4-bit memory | 1.1 TB · 8× H200 (1,128 GB) | — |
| API price | $1.32 in / $3.96 out per 1M tokens | $10.00 in / $50.00 out per 1M tokens |
| API speed | 94 tok/s | 71 tok/s |
Related comparisons
Sources
| Model | Test | Score | Setting | Source |
|---|---|---|---|---|
| DeepSeek V4 Pro | GPQA Diamond | 90.1 | V4-Pro (Preview) Max, pass@1 | Hugging Face model card (DeepSeek-V4-Pro) |
| Claude Fable 5.1 | GPQA Diamond | 93.7 | GPQA Diamond; AA independent run (Max, Default Fallback) | Artificial Analysis |
| DeepSeek V4 Pro | Humanity's Last Exam | 42.7 | V4-Pro-0813, no tools | Hugging Face model card (DeepSeek-V4-Pro-0813) |
| Claude Fable 5.1 | Humanity's Last Exam | 60.9 | Humanity's Last Exam, no tools; max effort | Anthropic Claude Fable 5.1 / Mythos 5.1 System Card (Table 8.1.A) |
| DeepSeek V4 Pro | Humanity's Last Exam (with tools) | 60.0 | V4-Pro-0813, with tools | Hugging Face model card (DeepSeek-V4-Pro-0813) |
| Claude Fable 5.1 | Humanity's Last Exam (with tools) | 65.0 | Humanity's Last Exam, with tools; max effort (Opus 5.5 system card lists Fable 5.1 at 65.6%) | Anthropic Claude Fable 5.1 / Mythos 5.1 System Card (Table 8.1.A) |
| DeepSeek V4 Pro | SWE-bench Pro | 55.4 | V4-Pro (Preview) Max, resolved | Hugging Face model card (DeepSeek-V4-Pro) |
| Claude Fable 5.1 | SWE-bench Pro | 81.2 | SWE-bench Pro; adaptive thinking max effort; avg of 5 trials | Anthropic Claude Fable 5.1 / Mythos 5.1 System Card (Table 8.1.A / sec 8.2) |
| DeepSeek V4 Pro | LMArena Text Elo | 1465 | DeepSeek-V4-Pro (High, 20260813), ±7, board dated 2026-10-27 | LMArena (arena.ai) text leaderboard |
| Claude Fable 5.1 | LMArena Text Elo | 1504 | LMArena Text, Overall; snapshot Oct 27, 2026; Claude Fable 5.1 (Max); +/-6 | LMArena (arena.ai) Text leaderboard |
Scores are published results from model cards, lab reports, and public leaderboards, each linked to its source. Settings such as thinking mode or test version differ between sources and are shown next to each score. OpenLLM Buddy catalog models are uncensored fine-tunes; their scores are those of the official base model. Data collected 2026-10-30. How the index works