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Claude Fable 5 vs DeepSeek V4 Pro 0813

Claude Fable 5 grades higher overall (90.7 against 78.5). DeepSeek V4 Pro 0813 costs 92% less for the same work.

Claude Fable 5

by Anthropic · #3 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$10.00
Output / 1M
$50.00

DeepSeek V4 Pro 0813

by DeepSeek · #19 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$1.30
Output / 1M
$2.60

Better overall

Claude Fable 5

Grade 90.7 vs 78.5

Cheaper

DeepSeek V4 Pro 0813

92% less, $1.63 vs $20.00 blended

Larger context

DeepSeek V4 Pro 0813

1M vs 1M tokens

Terminal-Bench 2.1

DeepSeek V4 Pro 0813

84.3% vs 87.9%

Head to head

Public benchmarks. Longer is better; each value links to its source.

LMArena TextElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,503
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: 1,465
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: 1,582
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: 1,505
SWE-bench Verified% of issues resolved · SWE-bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: —
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Aug 13, 2026 · reference
DeepSeek V4 Pro 0813DeepSeek V4 Pro 0813: 87.9%v

Claude Fable 5DeepSeek V4 Pro 0813v = reported by the model’s maker. — = no public score yet. Arena bars span the range across every model we grade.

What it costs you

Drag to match your monthly usage.

Claude Fable 5$4,000 /month
DeepSeek V4 Pro 0813$364 /month

DeepSeek V4 Pro 0813 saves you $3,636 a month at this usage, $43,632 a year.

At a glance

AttributeClaude Fable 5DeepSeek V4 Pro 0813
Made byAnthropicDeepSeek
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Excellent · 78.5
Overall rank#3 of 67#19 of 67
Input price$10.00 per 1M$1.30 per 1M
Output price$50.00 per 1M$2.60 per 1M
Context window1,000,000 tokens1,048,576 tokens
Reasoning levelsYesNo
Reads imagesYesNo
Model IDclaude-fable-5deepseek-v4-pro-0813

Try both with one key

Same endpoint, same key, both hosted in the USA. Change one word to switch models, in Claude Code, Cursor, Cline or your own code.

Get your API key
# Ask either model the same thing
curl https://fullsendai.com/v1/chat/completions \
  -H "Authorization: Bearer $FULLSEND_API_KEY" \
  -d '{"model": "claude-fable-5", "messages": [...]}'

# …then swap one word
  -d '{"model": "deepseek-v4-pro-0813", "messages": [...]}'

Questions

Is Claude Fable 5 or DeepSeek V4 Pro 0813 better?

Claude Fable 5 grades 90.7 against 78.5 for DeepSeek V4 Pro 0813, from public benchmarks.

Which is cheaper, Claude Fable 5 or DeepSeek V4 Pro 0813?

DeepSeek V4 Pro 0813: $1.30 in and $2.60 out per million tokens, against $10.00 and $50.00 through FullsendAI.

Which has the larger context window?

DeepSeek V4 Pro 0813, with 1,048,576 tokens.

Can I use both with one API key?

Yes, once they launch: both are coming soon, at the prices shown, and both will use the same FullsendAI key.

Model rankingsAll benchmarksCompare other models

Scores: LMArena (CC BY 4.0), SWE-bench, Scale AI SWE-Bench Pro, Terminal-Bench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.