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Claude Fable 5 vs Granite 4.2 8B

Claude Fable 5 grades higher overall (90.7 against 30.8). Granite 4.2 8B costs 99% 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

Granite 4.2 8B

by IBM · #62 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.060
Output / 1M
$0.25

Better overall

Claude Fable 5

Grade 90.7 vs 30.8

Cheaper

Granite 4.2 8B

99% less, $0.11 vs $20.00 blended

Larger context

Claude Fable 5

1M vs 128K tokens

SWE-bench Verified

Claude Fable 5

95% vs 47.7%

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
Granite 4.2 8BGranite 4.2 8B: 1,290
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
Granite 4.2 8BGranite 4.2 8B: —
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
Granite 4.2 8BGranite 4.2 8B: 1,370
SWE-bench Verified% of issues resolved · SWE-bench · Aug 25, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Aug 25, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Aug 25, 2026 · reference
LiveCodeBenchpass@1, % · LiveCodeBench · Aug 7, 2026 · reference
Claude Fable 5Claude Fable 5: —

Claude Fable 5Granite 4.2 8Bv = 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
Granite 4.2 8B$22.00 /month

Granite 4.2 8B saves you $3,978 a month at this usage, $47,736 a year.

At a glance

AttributeClaude Fable 5Granite 4.2 8B
Made byAnthropicIBM
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Good · 30.8
Overall rank#3 of 67#62 of 67
Input price$10.00 per 1M$0.060 per 1M
Output price$50.00 per 1M$0.25 per 1M
Context window1,000,000 tokens131,072 tokens
Reasoning levelsYesNo
Reads imagesYesNo
Model IDclaude-fable-5granite-4.2-8b

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": "granite-4.2-8b", "messages": [...]}'

Questions

Is Claude Fable 5 or Granite 4.2 8B better?

Claude Fable 5 grades 90.7 against 30.8 for Granite 4.2 8B, from public benchmarks.

Which is cheaper, Claude Fable 5 or Granite 4.2 8B?

Granite 4.2 8B: $0.060 in and $0.25 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.

Model rankingsAll benchmarksCompare other models

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