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Claude Fable 5 vs Gemma 4 31B IT

Claude Fable 5 grades higher overall (90.7 against 66.5). Gemma 4 31B IT 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

Gemma 4 31B IT

by Google · #33 of 67 overall

Coming soon · price at launch
Context
256K
Input / 1M
$0.20
Output / 1M
$0.40

Better overall

Claude Fable 5

Grade 90.7 vs 66.5

Cheaper

Gemma 4 31B IT

99% less, $0.25 vs $20.00 blended

Larger context

Claude Fable 5

1M vs 256K 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
Gemma 4 31B ITGemma 4 31B IT: 1,452
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
Gemma 4 31B ITGemma 4 31B IT: 1,366
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
Gemma 4 31B ITGemma 4 31B IT: 1,502
SWE-bench Verified% of issues resolved · SWE-bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
Gemma 4 31B ITGemma 4 31B IT: —
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
Gemma 4 31B ITGemma 4 31B IT: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Jun 9, 2026 · reference
Gemma 4 31B ITGemma 4 31B IT: —
LiveCodeBenchpass@1, % · LiveCodeBench · Mar 11, 2026 · reference
Claude Fable 5Claude Fable 5: —
Gemma 4 31B ITGemma 4 31B IT: 80%v

Claude Fable 5Gemma 4 31B ITv = 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
Gemma 4 31B IT$56.00 /month

Gemma 4 31B IT saves you $3,944 a month at this usage, $47,328 a year.

At a glance

AttributeClaude Fable 5Gemma 4 31B IT
Made byAnthropicGoogle
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Strong · 66.5
Overall rank#3 of 67#33 of 67
Input price$10.00 per 1M$0.20 per 1M
Output price$50.00 per 1M$0.40 per 1M
Context window1,000,000 tokens262,144 tokens
Reasoning levelsYesNo
Reads imagesYesYes
Model IDclaude-fable-5gemma-4-31b-it

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": "gemma-4-31b-it", "messages": [...]}'

Questions

Is Claude Fable 5 or Gemma 4 31B IT better?

Claude Fable 5 grades 90.7 against 66.5 for Gemma 4 31B IT, from public benchmarks.

Which is cheaper, Claude Fable 5 or Gemma 4 31B IT?

Gemma 4 31B IT: $0.20 in and $0.40 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.