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Claude Mythos 5.1 vs GPT-5.6 Sol

4 SHARED BENCHMARKS

Across 4 shared benchmarks, Claude Mythos 5.1 scores higher on 4 and GPT-5.6 Sol on 0. The widest gap is Terminal-Bench 4.0, where Claude Mythos 5.1 scores 60.9 against 37.3.

ANTHROPICVSOPENAI4 SHARED4–0 HEAD-TO-HEAD

BenchmarkClaude Mythos 5.1MARGINGPT-5.6 Sol

BioMysteryBench (Human Difficult)44.128.8

BioMysteryBench (Human Solvable)90.386.1

ProteinGym Hard49.335.5

Terminal-Bench 4.060.937.3

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing.

Compare GPT-5.6 Sol withEVERY TRACKED PAIRING

▶Anthropic12 PAIRINGS

Claude Opus 4.8 Claude Opus 4.6 Claude Sonnet 4.5 Claude 3.5 Sonnet Claude Opus 4.5 Claude Fable 5 Claude Opus 5 Claude Opus 4.7 Claude Sonnet 4 Claude Sonnet 4.6 Claude Sonnet 5 Claude Opus 4

▶OpenAI10 PAIRINGS

GPT-5.5 GPT-4o GPT-5.2 GPT-5.4 GPT-5 o3 GPT-5.1 o4-mini o1 GPT-4o mini

▶Google11 PAIRINGS

Gemini 3.1 Pro Gemini 3 Pro Gemma 4 26B A4B Gemini 1.5 Pro Gemma 4 31B Gemini 2.5 Pro Gemini 3.5 Flash Gemini 3 Flash Preview Gemini 3.6 Flash Gemma 4 E2B Gemini 2.5 Flash

▶Alibaba11 PAIRINGS

Qwen3.5 35B A3B Qwen3.5 397B A17B Qwen3 VL 4B (Reasoning)Qwen2.5 Instruct 72B Qwen3.5 27B Qwen3.6 Plus Qwen3.6 27B Qwen3.6 35B A3B Qwen3.7 Max Qwen3.5 122B A10B Qwen3.7 Plus Preview

▶DeepSeek5 PAIRINGS

DeepSeek-V3 DeepSeek-V4-Pro DeepSeek-V3.2 DeepSeek-V4-Flash DeepSeek-R1

▶Moonshot4 PAIRINGS

Kimi K2.5 Kimi K2.6 Kimi K3 Kimi K2 Instruct

▶Meta2 PAIRINGS

Llama 3.1 Instruct 405B Muse Spark 1.1

▶Z.ai2 PAIRINGS

GLM-5.1 GLM-5.2

▶MiniMax1 PAIRING

▶NVIDIA1 PAIRING

Nemotron 3 Super 120B A12B