Claude Opus 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Opus 4.5 vs GPT-5.3 Chat
Compare Claude Opus 4.5 by Anthropic against GPT-5.3 Chat by OpenAI, tested across 52 shared challenges. Updated March 2026.
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Claude Opus 4.5vsGPT-5.3 Chat
47 fights queued
Why Claude Opus 4.5?
Dead even. This one’s a coin flip.
Why GPT-5.3 Chat?
3 months newerMar 2026
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Claude Opus 4.5GPT-5.3 Chat
12 / 47
Estimate Complexityreasoning
Tests an AI's ability to make educated estimates based on technical knowledge
GPT-5.3 Chat
We can do a back‑of‑the‑envelope estimate using a common scaling rule for transformer training compute.
- Known approximate GPT‑3 specs
- Parameters N ≈ 175 billion = 1.75 × 10^11
- Training tokens T ≈ 300 billion = 3 × 10^11
- FLOPs per token for a transformer
For large transformers, a common approximation is:
FLOPs per token ≈ 6 × N
Reasoning (rough):
- Forward pass through all layers costs ~2N multiply‑adds.
- Backpropagation roughly doubles or triples that cost.
- Total ≈ ~6N FLOPs per token for forward + backward + gradients.
- Total training FLOPs
Total compute ≈ (FLOPs per token) × (number of tokens)
= 6 × N × T
Plug in values:
6 × (1.75 × 10^11) × (3 × 10^11)
First multiply constants: 6 × 1.75 × 3 = 31.5
Then powers: 10^11 × 10^11 = 10^22
So:
Total ≈ 31.5 × 10^22
≈ 3.15 × 10^23 FLOPs
- Final estimate
Total training compute for GPT‑3 is on the order of:
≈ 3 × 10^23 FLOPs
- Sanity check
This sits in the typical reported range (~10^23 FLOPs) for GPT‑3‑scale training, so the estimate is reasonable.
Final estimate: about 3 × 10^23 FLOPs to train GPT‑3.
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2 / 47
AI Board Game Logicreasoning
Tests an AI's ability to understand game rules and strategy
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3 / 47
Logic Puzzlereasoning
Tests an AI's ability to solve a simple but potentially confusing logic puzzle
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4 / 47
Stochastic Consistency Testanalysis
Tests an AI's randomness and creativity
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5 / 47
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
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6 / 47
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
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7 / 47
Generate a Stand-Up Routineconversation
Tests an AI's humor and creative writing ability
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8 / 47
Realistic AI Interviewconversation
Tests an AI's ability to simulate personalities and predict future trends
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Sponsored
9 / 47
Satirical Fake News Headlineconversation
Tests an AI's humor and understanding of current events
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10 / 47
Character Voice Testconversation
Tests an AI's ability to write in distinct character voices
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11 / 47
Minimalist Landing Pageweb design
Tests an AI's ability to generate a complete, working landing page
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12 / 47
Pokémon Battle UI Recreationweb design
Recreate an interactive, nostalgic Pokémon battle UI in a single HTML file.
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