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Claude Fable 5 vs Gemini 3.1 Pro

Anthropic · released

Wins 5 of 8 areas

Coding · Agents · Reasoning · Images and charts · Math

Google · released

Wins 2 of 8 areas

Facts · Following instructions

Claude Fable 5 is the stronger all-rounder.Gemini 3.1 Pro is cheaper and better at following instructions.

Both rank among the ten best models we track in facts.

Scores updated · 65 tests both models report · How we compare

Where each one wins

Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.

Long documents rests on a single test.

What it costs

Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.

Claude Fable 5$10.00 to read · $50.00 to write$60Price from Anthropic's own price page
Gemini 3.1 Pro$2.00 to read · $12.00 to write$14Price from Artificial Analysis

Gemini 3.1 Pro costs 77% less for the same work.

The biggest differences

The three tests each model wins by the widest margin. Scores are out of 100.

Where Claude Fable 5 pulls ahead

  • Extremely hard research-level math problemsFrontierMath Tier 4+63.4points aheadClaude Fable 590.2Gemini 3.1 Pro26.8
  • Real work tasks from 44 professionsGDPVal+40.9points aheadClaude Fable 555.6Gemini 3.1 Pro14.7
  • Complex command-line tasks across many fieldsTerminal-Bench 4.0+38.4points aheadClaude Fable 542.4Gemini 3.1 Pro4

Where Gemini 3.1 Pro pulls ahead

Every test, side by side

All 65 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingClaude Fable 5

Full coding ranking

AgentsClaude Fable 5

Full agents ranking

ReasoningClaude Fable 5

Full reasoning ranking

FactsGemini 3.1 Pro

Full facts ranking

Images and chartsClaude Fable 5

Full images and charts ranking

MathClaude Fable 5

Full math ranking

Long documentsEven

Full long documents ranking

Following instructionsGemini 3.1 Pro

Full following instructions ranking

Other results32 tests, not counted

Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.

Questions people ask

Which is better, Claude Fable 5 or Gemini 3.1 Pro?

Claude Fable 5 wins five of the eight areas we test: coding, agents, reasoning, images and charts and math. Gemini 3.1 Pro wins facts and following instructions, and costs 77% less. They are level on long documents.

Which is better for coding?

Claude Fable 5. It wins 9 of the 9 coding tests both models report; Gemini 3.1 Pro wins none.

Which is cheaper?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; Gemini 3.1 Pro costs $2.00 and $12.00. That makes Gemini 3.1 Pro about 77% cheaper for the same work.

How do you compare the two?

We use the 65 benchmark tests both models have published scores on. The verdict counts the 33 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 32 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.

Compare Claude Fable 5 with

Anthropic

Across the field

Compare Gemini 3.1 Pro with

Google

Across the field

All comparisons