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Claude Fable 5 vs Gemma 3 12B IT

Claude Fable 5 grades higher overall (90.7 against 35.0). Gemma 3 12B IT 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

Gemma 3 12B IT

by Google · #59 of 67 overall

Coming soon · price at launch
Context
128K
Input / 1M
$0.050
Output / 1M
$0.15

Better overall

Claude Fable 5

Grade 90.7 vs 35.0

Cheaper

Gemma 3 12B IT

100% less, $0.075 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
Gemma 3 12B ITGemma 3 12B IT: 1,342
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
Gemma 3 12B ITGemma 3 12B IT: —
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
Gemma 3 12B ITGemma 3 12B IT: 1,316
SWE-bench Verified% of issues resolved · SWE-bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
Gemma 3 12B ITGemma 3 12B IT: —
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
Gemma 3 12B ITGemma 3 12B IT: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Jun 9, 2026 · reference
Gemma 3 12B ITGemma 3 12B IT: —

Claude Fable 5Gemma 3 12B 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 3 12B IT$16.00 /month

Gemma 3 12B IT saves you $3,984 a month at this usage, $47,808 a year.

At a glance

AttributeClaude Fable 5Gemma 3 12B IT
Made byAnthropicGoogle
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Good · 35.0
Overall rank#3 of 67#59 of 67
Input price$10.00 per 1M$0.050 per 1M
Output price$50.00 per 1M$0.15 per 1M
Context window1,000,000 tokens131,072 tokens
Reasoning levelsYesNo
Reads imagesYesYes
Model IDclaude-fable-5gemma-3-12b-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-3-12b-it", "messages": [...]}'

Questions

Is Claude Fable 5 or Gemma 3 12B IT better?

Claude Fable 5 grades 90.7 against 35.0 for Gemma 3 12B IT, from public benchmarks.

Which is cheaper, Claude Fable 5 or Gemma 3 12B IT?

Gemma 3 12B IT: $0.050 in and $0.15 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, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.