Claude Fable 5 vs Gemini 4 Argon
Different efforts: max · high · Compare all at high
Humanity's Last Exam Humanity's Last Exam: Very hard expert questions across many fields, written to stump today’s models
Fable 555.5
Gemini 4 Argon57.1
Arena Text · overall Arena Text · overall: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,504
Gemini 4 Argon1,524
Arena Text · Chinese Arena Text · chinese: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,542.3
Gemini 4 Argon1,608.3
Arena Text · English Arena Text · english: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,499
Gemini 4 Argon1,537.7
Arena Text · instruction following Arena Text · instruction following: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,502.3
Gemini 4 Argon1,535.6
Arena Text · non-English Arena Text · non english: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,480.7
Gemini 4 Argon1,521.7
Arena Text · Russian Arena Text · russian: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,503
Gemini 4 Argon1,534
Arena Text · Spanish Arena Text · spanish: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,495.8
Gemini 4 Argon1,504.4
AA Omniscience Index AA Omniscience Index: Scores factual knowledge while penalizing incorrect answers to encourage admitting uncertainty
Fable 543.3
Gemini 4 Argon42.4
SimpleQA Verified v1 SimpleQA Verified v1: Accuracy on short factual questions with verified answers, answered without web access
Fable 5 · xhigh70.7
Gemini 4 Argon76
CritPt (physics) CritPt (physics): Research-level physics problems that need many careful reasoning steps
Fable 528.6
Gemini 4 Argon27.1
AA Intelligence Index 4.3.2 AA Intelligence Index 4.3.2: Artificial Analysis combines tests of knowledge, reasoning, coding and tool use into one score
Fable 549.6
Gemini 4 Argon52.6
AA Omniscience · Accuracy AA Omniscience · Accuracy: Measures correct answers on the AA Omniscience factual knowledge test
Fable 565.4
Gemini 4 Argon49.9
AA Omniscience · Hallucination Rate AA Omniscience · Hallucination Rate: Measures how often attempted answers are incorrect on the AA Omniscience factual knowledge test · lower is better
Fable 563.6
Gemini 4 Argon15.1
AA-LCR (long context) 1.1 AA-LCR (long context) 1.1: Questions that need reading and connecting facts across very long documents (around 100K tokens)
Fable 582.3
Gemini 4 Argon79.7
GDP.pdf · AA all-pass GDP.pdf · AA all-pass: Models reason over professional PDF documents; an attempt passes only when every atomic criterion passes
Fable 524
Gemini 4 Argon21.8
ARC-AGI-1 · public evaluation ARC-AGI-1 · public-eval: Models infer transformations from examples and solve unseen grid puzzles; the evaluation split is explicit
Fable 597.6
Gemini 4 Argon99.5
ARC-AGI-1 · semi-private ARC-AGI-1 · semi-private: Models infer transformations from examples and solve unseen grid puzzles; the evaluation split is explicit
Fable 598.5
Gemini 4 Argon98.5
ARC-AGI-2 · public evaluation ARC-AGI-2 · public-eval: Models infer transformations from examples and solve unseen grid puzzles; the evaluation split is explicit
Fable 596.4
Gemini 4 Argon97.1
ARC-AGI-2 · semi-private ARC-AGI-2 · semi-private: Models infer transformations from examples and solve unseen grid puzzles; the evaluation split is explicit
Fable 589.2
Gemini 4 Argon91.3
Chess Puzzles Chess Puzzles: Models choose the best next move from a novel chess position
Fable 547
Gemini 4 Argon59
FrontierMath Tier 4 (v2) FrontierMath Tier 4 (v2): Models solve expert-written advanced mathematics problems on the named tier and edition
Fable 590.2
Gemini 4 Argon78
FrontierMath Tiers 1–3 (v2) FrontierMath Tiers 1–3 (v2): Models solve expert-written advanced mathematics problems on the named tier and edition
Fable 587
Gemini 4 Argon86
Mystery Game Puzzles Mystery Game Puzzles: Models choose the best move in puzzle positions from an undisclosed game
Fable 552
Gemini 4 Argon64
Vals LegalBench Vals LegalBench: Legal reasoning and legal-language understanding on LegalBench
Fable 588.6
Gemini 4 Argon88.3
Vals MedCode Vals MedCode: Medical coding accuracy on patient encounters
Fable 556.1
Gemini 4 Argon58.8
Vals MedScribe Vals MedScribe: Accuracy of clinical notes produced from consultation transcripts
Fable 588.5
Gemini 4 Argon87.4
Vals Legal Research Bench Vals Legal Research Bench: Grounded legal research; a task passes only if all criteria pass
Fable 549.5
Gemini 4 Argon54.8
Arena Text · French Arena Text · french: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,503.6
Gemini 4 Argon—
Arena Text · German Arena Text · german: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,486.7
Gemini 4 Argon—
Arena Text · Japanese Arena Text · japanese: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,506.4
Gemini 4 Argon—
Arena Text · Korean Arena Text · korean: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,491
Gemini 4 Argon—
Arena Text · Polish Arena Text · polish: Human pairwise preferences in the stated text vote pool
Fable 5 · high1,493.4
Gemini 4 Argon—
IFBench (instructions) IFBench (instructions): Checks whether the model follows precise formatting and content instructions
Fable 563.5
Gemini 4 Argon—
MLCR-AA MLCR-AA: Models synthesize long medical records; the headline credits concise answers judged both accurate and complete
Fable 564.4
Gemini 4 Argon—
ARC-AGI-3 · semi-private ARC-AGI-3 · semi-private: Measures interactive game solving through relative human action efficiency
Fable 5—
Gemini 4 Argon · low49.8
EQ-Bench 3 EQ-Bench 3: Judge-rated responses to social and emotionally nuanced scenarios, scored through the source pairwise ranking
Fable 52,049.7
Gemini 4 Argon—
FrontierMath Erdos FrontierMath Erdos: Models solve expert-written advanced mathematics problems on the named tier and edition
Fable 50
Gemini 4 Argon—
MathArena · ArXivMath · April 2026 MathArena · arxiv · 04/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 572.5
Gemini 4 Argon—
MathArena · ArXivMath · August 2026 MathArena · arxiv · 08/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 5—
Gemini 4 Argon82.5
MathArena · ArXivMath · June 2026 MathArena · arxiv · 06/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 585.4
Gemini 4 Argon—
MathArena · ArXivMath · May 2026 MathArena · arxiv · 05/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 587.5
Gemini 4 Argon—
MathArena · ArXivMath · September 2026 MathArena · arxiv · 09/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 5—
Gemini 4 Argon87.7
MathArena · BrokenArXiv · April 2026 MathArena · arxiv_false · 04/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 554.1
Gemini 4 Argon—
MathArena · BrokenArXiv · August 2026 MathArena · arxiv_false · 08/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 5—
Gemini 4 Argon54.2
MathArena · BrokenArXiv · June 2026 MathArena · arxiv_false · 06/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 547.8
Gemini 4 Argon—
MathArena · BrokenArXiv · May 2026 MathArena · arxiv_false · 05/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 544.5
Gemini 4 Argon—
MathArena · BrokenArXiv · September 2026 MathArena · arxiv_false · 09/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 5—
Gemini 4 Argon49.7
MathArena · ArXivLean · June 2026 MathArena · arxivlean · 06/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 515.2
Gemini 4 Argon—
MathArena · ArXivLean · September 2026 MathArena · arxivlean · 09/2026: Answer accuracy on the named mathematics competition under the recorded effort
Fable 5—
Gemini 4 Argon39.6
Vals Science Index Vals Science Index: Scientific problem solving across the index’s component evaluations
Fable 5—
Gemini 4 Argon55.4
| Benchmark | Fable 5 | Gemini 4 Argon |
|---|---|---|
| Humanity's Last Exam | 55.5 | 57.1 |
| Arena Text · overall | 1,504 · high | 1,524 |
| Arena Text · Chinese | 1,542.3 · high | 1,608.3 |
| Arena Text · English | 1,499 · high | 1,537.7 |
| Arena Text · instruction following | 1,502.3 · high | 1,535.6 |
| Arena Text · non-English | 1,480.7 · high | 1,521.7 |
| Arena Text · Russian | 1,503 · high | 1,534 |
| Arena Text · Spanish | 1,495.8 · high | 1,504.4 |
| AA Omniscience Index | 43.3 | 42.4 |
| SimpleQA Verified v1 | 70.7 · xhigh | 76 |
| CritPt (physics) | 28.6 | 27.1 |
| AA Intelligence Index 4.3.2 | 49.6 | 52.6 |
| AA Omniscience · Accuracy | 65.4 | 49.9 |
| AA Omniscience · Hallucination Rate | 63.6 | 15.1 |
| AA-LCR (long context) 1.1 | 82.3 | 79.7 |
| GDP.pdf · AA all-pass | 24 | 21.8 |
| ARC-AGI-1 · public evaluation | 97.6 | 99.5 |
| ARC-AGI-1 · semi-private | 98.5 | 98.5 |
| ARC-AGI-2 · public evaluation | 96.4 | 97.1 |
| ARC-AGI-2 · semi-private | 89.2 | 91.3 |
| Chess Puzzles | 47 | 59 |
| FrontierMath Tier 4 (v2) | 90.2 | 78 |
| FrontierMath Tiers 1–3 (v2) | 87 | 86 |
| Mystery Game Puzzles | 52 | 64 |
| Vals LegalBench | 88.6 | 88.3 |
| Vals MedCode | 56.1 | 58.8 |
| Vals MedScribe | 88.5 | 87.4 |
| Vals Legal Research Bench | 49.5 | 54.8 |
| Arena Text · French | 1,503.6 · high | — |
| Arena Text · German | 1,486.7 · high | — |
| Arena Text · Japanese | 1,506.4 · high | — |
| Arena Text · Korean | 1,491 · high | — |
| Arena Text · Polish | 1,493.4 · high | — |
| IFBench (instructions) | 63.5 | — |
| MLCR-AA | 64.4 | — |
| ARC-AGI-3 · semi-private | — | 49.8 · low |
| EQ-Bench 3 | 2,049.7 | — |
| FrontierMath Erdos | 0 | — |
| MathArena · ArXivMath · April 2026 | 72.5 | — |
| MathArena · ArXivMath · August 2026 | — | 82.5 |
| MathArena · ArXivMath · June 2026 | 85.4 | — |
| MathArena · ArXivMath · May 2026 | 87.5 | — |
| MathArena · ArXivMath · September 2026 | — | 87.7 |
| MathArena · BrokenArXiv · April 2026 | 54.1 | — |
| MathArena · BrokenArXiv · August 2026 | — | 54.2 |
| MathArena · BrokenArXiv · June 2026 | 47.8 | — |
| MathArena · BrokenArXiv · May 2026 | 44.5 | — |
| MathArena · BrokenArXiv · September 2026 | — | 49.7 |
| MathArena · ArXivLean · June 2026 | 15.2 | — |
| MathArena · ArXivLean · September 2026 | — | 39.6 |
| Vals Science Index | — | 55.4 |
Specs
| Spec | Fable 5 | Gemini 4 Argon |
|---|---|---|
| Input, per 1M | $10 | !$2 |
| Output, per 1M | $50 | !$10 |
| Cost per task? | $8.75 | $1.99 |
| Speed, tok/s | 67 | 84 |
| Context | 1M | 1M |
| Weights | Closed | Closed |
| Released | Jun 2026 | Oct 2026 |
| See images | ✓ | ✓ |
| Read PDFs | Partial | ✓ |
| Hear audio | — | ✓ |
| Watch video | — | ✓ |
| Call tools | ✓ | ✓ |
| Force a tool call | Partial | Partial |
| Return strict JSON | ✓ | ✓ |
| Search the web | ? | ✓ |
| Run code | ? | ✓ |
| Use a computer | ? | ? |
What breaks when you switch
Fable 5 → Gemini 4 Argon
Synchronous output stops at 65,536›
With background false, output limits above 65,536 tokens return HTTP 400; stay at or below that limit.
Sampling parameters are ignored›
temperature, top_p and top_k are ignored; remove them from requests.
No explicit caching›
Explicit caching is unavailable; omit explicit cache requests.
Gemini 4 Argon → Fable 5
Nothing known.