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Claude Fable 5 vs Meta Llama 3.1 8B Instruct Turbo

Claude Fable 5 grades higher overall (90.7 against 0.0). Meta Llama 3.1 8B Instruct Turbo costs 100% 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

Meta Llama 3.1 8B Instruct Turbo

by Meta · #67 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.020
Output / 1M
$0.040

Better overall

Claude Fable 5

Grade 90.7 vs 0.0

Cheaper

Meta Llama 3.1 8B Instruct Turbo

100% less, $0.025 vs $20.00 blended

Larger context

Claude Fable 5

1M vs 128K tokens

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
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: 1,211
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: —
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: 1,260
SWE-bench Verified% of issues resolved · SWE-bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: —
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 84.3%v
Meta Llama 3.1 8B Instruct TurboMeta Llama 3.1 8B Instruct Turbo: —

Claude Fable 5Meta Llama 3.1 8B Instruct Turbov = 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
Meta Llama 3.1 8B Instruct Turbo$5.60 /month

Meta Llama 3.1 8B Instruct Turbo saves you $3,994 a month at this usage, $47,933 a year.

At a glance

AttributeClaude Fable 5Meta Llama 3.1 8B Instruct Turbo
Made byAnthropicMeta
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Good · 0.0
Overall rank#3 of 67#67 of 67
Input price$10.00 per 1M$0.020 per 1M
Output price$50.00 per 1M$0.040 per 1M
Context window1,000,000 tokens131,072 tokens
Reasoning levelsYesNo
Reads imagesYesNo
Model IDclaude-fable-5meta-llama-3.1-8b-instruct-turbo

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": "meta-llama-3.1-8b-instruct-turbo", "messages": [...]}'

Questions

Is Claude Fable 5 or Meta Llama 3.1 8B Instruct Turbo better?

Claude Fable 5 grades 90.7 against 0.0 for Meta Llama 3.1 8B Instruct Turbo, from public benchmarks.

Which is cheaper, Claude Fable 5 or Meta Llama 3.1 8B Instruct Turbo?

Meta Llama 3.1 8B Instruct Turbo: $0.020 in and $0.040 out per million tokens, against $10.00 and $50.00 through FullsendAI.

Which has the larger context window?

Claude Fable 5, with 1,000,000 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.

Compare with others

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.