Model comparison
Claude Fable 5 vs Gemini 3 Pro
Head-to-head evidence from 11 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Fable 5 #2 (Supported); Gemini 3 Pro #19 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Fable 5 and Gemini 3 Pro share 11 comparable benchmark results. 1 of 8 categories are comparable. 23 results are unique to Claude Fable 5; 16 to Gemini 3 Pro.
Updated July 23, 2026- Shared results
- 11
- Claude Fable 5 only
- 23
- Gemini 3 Pro only
- 16
- Comparable categories
- 1 / 8
Pick Claude Fable 5 if you want the stronger benchmark profile. Gemini 3 Pro only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 5 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Fable 5 is clearly ahead on the BenchAlign aggregate, 83.68 to 67.73. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Fable 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $2.00 input / $12.00 output per 1M tokens for Gemini 3 Pro. That is roughly 4.2x on output cost alone. Claude Fable 5 is the reasoning model in the pair, while Gemini 3 Pro is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Gemini 3 Pro gives you the larger context window at 2M, compared with 1M+ for Claude Fable 5.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Fable 5 | Δ | Gemini 3 Pro |
|---|---|---|---|
| Multimodal | Claude Fable 557.9 | Margin→ 23.2 | Gemini 3 Pro81.1 |
| Agentic | Claude Fable 584.6 | MarginNo overlap | Gemini 3 ProNot measured |
| Coding | Claude Fable 589.2 | MarginNo overlap | Gemini 3 ProNot measured |
| Reasoning | Claude Fable 5Not measured | MarginNo overlap | Gemini 3 Pro31.1 |
| Math | Claude Fable 5Not measured | MarginNo overlap | Gemini 3 Pro32.9 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Fable 5 | Gemini 3 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Fable 5$10 input / $50 output | Gemini 3 Pro$2 input / $12 output | Gemini 3 Pro has the lower combined listed price. |
| Generation speedtokens per second | Claude Fable 5Not available | Gemini 3 Pro109 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Fable 5Not available | Gemini 3 Pro32.65 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Fable 51M+ | Gemini 3 Pro2M | Gemini 3 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic15 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 84.3% | — | Not comparable |
| OSWorld-VerifiedSource | 85% | — | Not comparable |
| GDPval-AASource | 1748 | — | Not comparable |
| AA Agentic IndexSource | 52.8% | — | Not comparable |
| τ²-bench resultsSource | 98.5% | 87.1% | Claude Fable 5 leads |
| GDPval-AASource | 62.4% | — | Not comparable |
| AA BriefcaseSource | 1574 | — | Not comparable |
| AA AutomationBenchSource | 48.6% | — | Not comparable |
| AA EnterpriseOps-GymSource | 51.1% | — | Not comparable |
| AA Harvey LABSource | 93.6% | — | Not comparable |
| AA Tau3 BankingSource | 26.8% | — | Not comparable |
| terminalBenchHardSource | 62.9% | — | Not comparable |
| aaTerminalBench21Source | 84.6% | — | Not comparable |
| Gert LabsSource | — | 63.23% | Not comparable |
| JobBenchSource | — | 11.4% | Not comparable |
Coding11 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 95% | — | Not comparable |
| SWE-bench ProSource | 80% | — | Not comparable |
| FrontierCode 1.1 MainSource | 53.5% | — | Not comparable |
| Terminal-Bench 2.0Source | 84.3% | — | Not comparable |
| cursorBench31Source | 70.6% | — | Not comparable |
| cursorBench32Source | 70.5% | — | Not comparable |
| VulcanBench v3Source | 87.0% | — | Not comparable |
| AA Coding IndexSource | 76.5% | — | Not comparable |
| AA-SciCodeSource | 60.2% | 56.1% | Claude Fable 5 leads |
| Vibe Code BenchSource | — | 14.30% | Not comparable |
| AA LiveCodeBenchSource | — | 91.7% | Not comparable |
Reasoning3 benchmarks
Knowledge7 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 59.9% | 39.5% | Claude Fable 5 leads |
| AA-GPQA DiamondSource | 92.6% | 90.8% | Claude Fable 5 leads |
| AA-HLESource | 53.3% | 37.2% | Claude Fable 5 leads |
| AA-Omniscience IndexSource | 40.2% | 15.8% | Claude Fable 5 leads |
| AA-Omniscience AccuracySource | 61.4% | 55.9% | Claude Fable 5 leads |
| AA-Omniscience Hallucination RateSource | 54.9% | 90.9% | Claude Fable 5 leads |
| AA MMLU-ProSource | — | 89.8% | Not comparable |
Math2 benchmarks
Multilingual1 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| AA Global-MMLU-LiteSource | — | 92.2% | Not comparable |
MultimodalGemini 3 Pro wins10 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| Blueprint-Bench 2Source | 38.6% | — | Not comparable |
| OfficeQA ProSource | 57.9% | — | Not comparable |
| Design Arena WebsiteSource | 1332 | — | Not comparable |
| MMMU-ProSource | — | 81% | Not comparable |
| MathVisionSource | — | 86.6% | Not comparable |
| VideoMMMUSource | — | 87.6% | Not comparable |
| ScreenSpot ProSource | — | 72.7% | Not comparable |
| CharXivSource | — | 81.4% | Not comparable |
| V*Source | — | 88.0% | Not comparable |
| AA-MMMU-ProSource | — | 80.2% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 63.5% | 70.4% | Gemini 3 Pro leads |
Frequently Asked Questions (2)
Which is better, Claude Fable 5 or Gemini 3 Pro?
Claude Fable 5 is ahead on BenchLM's BenchAlign leaderboard, 83.68 to 67.73.
Which is better for multimodal and grounded tasks, Claude Fable 5 or Gemini 3 Pro?
Gemini 3 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 81.1 versus 57.9. Claude Fable 5 stays close enough that the answer can still flip depending on your workload.
Related Comparisons
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.