Model comparison
Chatgpt 4o Latest 20250326 vs Claude Fable 5
Claude Fable 5 is the stronger model overall, scoring 66.8 to 43.8 on the Noometry Index.
Last verified . 20 shared benchmarks.
Summary
- They share 20 benchmarks with published results for both. Chatgpt 4o Latest 20250326 scores higher in 0 categories and Claude Fable 5 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Fable 5 leads 88.5 to 38.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 75% for Chatgpt 4o Latest 20250326 and 91.4% for Claude Fable 5.
Side by side
| Chatgpt 4o Latest 20250326 | Claude Fable 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Noometry Index | 43.8 | 66.8 |
| Released | — | 2026-06-07 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $10 |
| Output $ / M tokens | — | $50 |
| Results tracked | 21 | 62 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 41.6 (#122), Claude Fable 5: 70.6 (#4)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Coding | 1413 | 1519 |
| DeepSWE | — | 69.9% |
| FrontierCode | — | 53.5% |
| LMArena WebDev | — | 1625 |
| FrontierSWE | — | 47% |
| SciCode | — | 61% |
| GSO | — | 78.4% |
| WeirdML | — | 91.9% |
| MirrorCode | — | 63.9% |
| ALE-Bench | — | 2,041 |
Agentic & Tool Use Not comparable
Chatgpt 4o Latest 20250326: —, Claude Fable 5: 54.0 (#2)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| APEX-Agents | — | 63.6% |
| Remote Labor Index | — | 16.1% |
| τ²-bench Banking | — | 39.7% |
| PostTrainBench | — | 41.8% |
| GBAEval | — | 74.5% |
| GDP.pdf | — | 30% |
| LMArena Search | — | 1230 |
| Vending-Bench 2 | — | 5,680 |
Reasoning Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 33.8 (#71), Claude Fable 5: 76.8 (#6)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| Kagi LLM Benchmark | 75% | 91.4% |
| LMArena Hard Prompts | 1424 | 1508 |
| ARC-AGI-2 | — | 89.2% |
| SimpleBench | — | 81.9% |
| NYT Connections (extended) | — | 92.7% |
| ARC-AGI-1 | — | 98.5% |
| CritPt | — | 28.6% |
| Chess Puzzles | — | 41% |
| EnigmaEval | — | 39.3% |
| EBR-Bench | — | 39.5% |
| Mystery Game Puzzles | — | 52% |
| DTBench | — | 98.4% |
| LMCA | — | 61.1% |
| Surface Evolver Bench | — | 95% |
| Bench to the Future 3 | — | 0.13 |
| Epoch Capabilities Index | — | 162.06 |
Math Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 38.6 (#134), Claude Fable 5: 88.5 (#5)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Math | 1407 | 1519 |
| FrontierMath (Tiers 1-3) | — | 87% |
| FrontierMath Tier 4 | — | 90.2% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 95% |
| FrontierMath Erdős | — | 0% |
Knowledge Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 39.2 (#137), Claude Fable 5: 62.2 (#25)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Expert | 1401 | 1534 |
| GPQA Diamond | — | 85.9% |
| SimpleQA Verified | — | 70.7% |
| Confabulations | 16.6% | — |
Multimodal Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 39.6 (#58), Claude Fable 5: 45.3 (#17)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Vision | 1243 | 1324 |
| Blueprint-Bench 2 | — | 38.6% |
| Furniture Assembly | — | 35.8% |
| LMArena Document | — | 1496 |
Multilingual Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 52.9 (#76), Claude Fable 5: 57.3 (#9)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Non-English | 1419 | 1481 |
| LMArena Chinese | 1457 | 1543 |
| LMArena French | 1446 | 1505 |
| LMArena German | 1423 | 1486 |
| LMArena Japanese | 1405 | 1506 |
| LMArena Korean | 1396 | 1488 |
| LMArena Russian | 1429 | 1504 |
| LMArena Spanish | 1434 | 1498 |
Instruction Following Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 74.0 (#107), Claude Fable 5: 78.6 (#8)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Instruction Following | 1403 | 1502 |
Long Context Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 43.1 (#107), Claude Fable 5: 46.3 (#23)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Longer Query | 1413 | 1509 |
Writing & Preference Claude Fable 5 leads
Chatgpt 4o Latest 20250326: 62.6 (#72), Claude Fable 5: 75.9 (#5)
| Benchmark | Chatgpt 4o Latest 20250326 | Claude Fable 5 |
|---|---|---|
| LMArena Text | 1429 | 1491 |
| LMArena Creative Writing | 1405 | 1494 |
| EQ-Bench Creative Writing | 1501 | 1943 |
| LMArena Multi-Turn | 1454 | 1504 |
| EQ-Bench 4 | — | 1340 |
Frequently asked questions
Is Chatgpt 4o Latest 20250326 better than Claude Fable 5?
Claude Fable 5 is the stronger model overall, scoring 66.8 to 43.8 on the Noometry Index.
Is Chatgpt 4o Latest 20250326 or Claude Fable 5 better for coding?
Claude Fable 5 scores higher on coding benchmarks: 70.6 versus 41.6 in the Noometry coding category.
How many benchmarks do Chatgpt 4o Latest 20250326 and Claude Fable 5 share?
20 benchmarks have published results for both models. Chatgpt 4o Latest 20250326 has 21 scored results on Noometry and Claude Fable 5 has 62.