Model comparison
Claude Fable 5 vs Gemini 3.6 Flash
Head-to-head evidence from 17 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Fable 5 #2 (Supported); Gemini 3.6 Flash unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Fable 5 and Gemini 3.6 Flash share 17 comparable benchmark results. 1 of 8 categories are comparable. 17 results are unique to Claude Fable 5; 2 to Gemini 3.6 Flash.
Updated July 21, 2026- Shared results
- 17
- Claude Fable 5 only
- 17
- Gemini 3.6 Flash only
- 2
- Comparable categories
- 1 / 8
Treat this as a split decision. Claude Fable 5 makes more sense if agentic is the priority or you need the larger 1M+ context window; Gemini 3.6 Flash is the better fit if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 17 shared benchmark results across 4 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 and Gemini 3.6 Flash finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Claude Fable 5 is also the more expensive model on tokens at $10.00 input / $50.00 output per 1M tokens, versus $1.50 input / $7.50 output per 1M tokens for Gemini 3.6 Flash. That is roughly 6.7x on output cost alone. Claude Fable 5 gives you the larger context window at 1M+, compared with 1M for Gemini 3.6 Flash.
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 3.6 Flash |
|---|---|---|---|
| Agentic | Claude Fable 584.6 | Margin← 1.6 | Gemini 3.6 Flash83.0 |
| Coding | Claude Fable 589.2 | MarginNo overlap | Gemini 3.6 FlashNot measured |
| Multimodal | Claude Fable 557.9 | MarginNo overlap | Gemini 3.6 FlashNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
OSWorld-Verified
AgenticA 85%B 83%Winner: Claude Fable 5Δ 2OSWorld-Verified: Claude Fable 5 scored 85%; Gemini 3.6 Flash scored 83%. Claude Fable 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Fable 5 | Gemini 3.6 Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Fable 5$10 input / $50 output | Gemini 3.6 Flash$1.5 input / $7.5 output | Gemini 3.6 Flash has the lower combined listed price. |
| Generation speedtokens per second | Claude Fable 5Not available | Gemini 3.6 FlashNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Fable 5Not available | Gemini 3.6 FlashNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Fable 51M+ | Gemini 3.6 Flash1M | Claude Fable 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Fable 5 wins13 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 84.3% | — | Not comparable |
| OSWorld-VerifiedSource | 85% | 83% | Claude Fable 5 leads |
| GDPval-AASource | 1748 | 1421 | Claude Fable 5 leads |
| AA Agentic IndexSource | 52.8% | 38.7% | Claude Fable 5 leads |
| τ²-bench resultsSource | 98.5% | — | Not comparable |
| GDPval-AASource | 62.4% | 46.1% | Claude Fable 5 leads |
| AA BriefcaseSource | 1574 | 961 | Claude Fable 5 leads |
| 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% | 24.5% | Claude Fable 5 leads |
| terminalBenchHardSource | 62.9% | — | Not comparable |
| aaTerminalBench21Source | 84.6% | 77.5% | Claude Fable 5 leads |
Coding10 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3.6 Flash | 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% | 69.2% | Claude Fable 5 leads |
| AA-SciCodeSource | 60.2% | 52.7% | Claude Fable 5 leads |
| deepSweSource | — | 49% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 59.9% | 50.1% | Claude Fable 5 leads |
| AA-GPQA DiamondSource | 92.6% | 92.8% | Gemini 3.6 Flash leads |
| AA-HLESource | 53.3% | 38.3% | Claude Fable 5 leads |
| AA-Omniscience IndexSource | 40.2% | 23.5% | Claude Fable 5 leads |
| AA-Omniscience AccuracySource | 61.4% | 50.2% | Claude Fable 5 leads |
| AA-Omniscience Hallucination RateSource | 54.9% | 53.5% | Gemini 3.6 Flash leads |
Multimodal4 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Fable 5 | Gemini 3.6 Flash | Result |
|---|---|---|---|
| AA-IFBenchSource | 63.5% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Fable 5 or Gemini 3.6 Flash?
Claude Fable 5 and Gemini 3.6 Flash are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for agentic tasks, Claude Fable 5 or Gemini 3.6 Flash?
Claude Fable 5 has the edge for agentic tasks in this comparison, averaging 84.6 versus 83. Inside this category, AA Briefcase is the benchmark that creates the most daylight between them.
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