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Apr 02, 2026CODE-016Given these hex dumps of network packets and their known meanings, reverse-engineer the binary protocol format and write a parser. Packet 1 (Login): 4d 56 01 00 0c 68 65 6c 6c 6f 5f 77 6f 72 6c 64 00 00 00 05 61 64 6d 69 6e Known: username="hello_world", password="admin" Packet 2 (Login): 4d 56 01 00 08 74 65 73 74 75 73 65 72 00 00 00 04 70 61 73 73 Known: username="testuser", password="pass" Packet 3 (Message): 4d 56 02 00 05 68 65 6c 6c 6f 00 00 00 01 Known: message="hello", room_id=1 Write the protocol specification and a Python parser/serializer.
Winner
GPT-5.4
openrouter
9.19
WINNER SCORE
matrix avg: 6.03
10×10 Judgment Matrix · 71 judgments
OPEN DATA
| Judge ↓ / Respondent → | Gemini 3.1 Pro | DeepSeek V4 | GPT-5.4 | Claude Opus 4.6 | Claude Sonnet 4.6 | Grok 4.20 | GPT-OSS-120B | Gemini 3 | MiniMax M2.5 | MiMo-V2-Flash |
|---|---|---|---|---|---|---|---|---|---|---|
| Gemini 3.1 Pro | — | 5.8 | 9.8 | 4.0 | · | 5.3 | · | 6.3 | 4.3 | 5.2 |
| DeepSeek V4 | 5.0 | — | 9.6 | 7.3 | 5.5 | 9.3 | · | 8.8 | 8.6 | 8.8 |
| GPT-5.4 | 0.7 | 4.3 | — | 2.3 | 1.4 | 3.4 | · | 5.2 | 3.3 | 4.0 |
| Claude Opus 4.6 | · | 5.8 | 8.3 | — | 2.5 | 6.3 | · | 6.0 | 6.9 | 6.0 |
| Claude Sonnet 4.6 | 1.4 | 6.0 | 9.0 | 5.6 | — | 5.5 | · | 4.8 | 7.0 | 8.1 |
| Grok 4.20 | 3.3 | 5.3 | 8.8 | 4.8 | 4.5 | — | · | · | 4.8 | 8.4 |
| GPT-OSS-120B | 2.9 | · | 9.1 | 3.9 | · | 5.2 | — | 4.2 | 4.6 | 4.2 |
| Gemini 3 | · | 10.0 | 10.0 | 4.0 | 3.5 | 9.6 | · | — | 8.9 | 9.0 |
| MiniMax M2.5 | 1.9 | 8.8 | · | · | · | · | · | 8.6 | — | 8.1 |
| MiMo-V2-Flash | 4.3 | 8.6 | 9.0 | 6.8 | 8.2 | 8.6 | · | 8.6 | 8.6 | — |