GPT-5.5 vs Hy3-preview
Wins 5 of 6 areas
Coding · Agents · Reasoning · Long documents · Following instructions
Wins 0 of 6 areas
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GPT-5.5 is the stronger all-rounder.Hy3-preview is cheaper.
Scores updated · 26 tests both models report · How we compare
Where each one wins
Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- AgentsCarrying out multi-step tasks on its own41GPT-5.54 of 6 tests · 1 tie
- CodingWriting and fixing software30GPT-5.53 of 5 tests · 2 ties
- ReasoningHard problems that need careful thinking30GPT-5.53 of 3 tests
- Long documentsFinding answers in very long texts10GPT-5.51 of 1 test
- Following instructionsDoing exactly what it is asked10GPT-5.51 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Hy3-preview costs 98% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-5.5 pulls ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+28.8points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+27.9points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+26points ahead
Where Hy3-preview pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+14.9points ahead
- Multi-step tasks using many real software toolsMCP Atlas+3.8points ahead
Every test, side by side
All 26 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.5
- Terminal-Bench HardGPT-5.5 by 28.860.631.8+28.8
- Terminal-Bench 2.1GPT-5.5 by 19.984.364.4+19.9
- SciCodeGPT-5.5 by 7.255.848.6+7.2
- SWE-bench Protie58.657.9tie
- LMArena · WebDevtie15131508tie
AgentsGPT-5.5
- τ-Bench V3 · BankingGPT-5.5 by 16.13922.9+16.1
- GDPValGPT-5.5 by 14.442.728.3+14.4
- Terminal-Bench 4.0GPT-5.5 by 14.114.60.5+14.1
- AA ApexAgentsGPT-5.5 by 12.137.725.6+12.1
- MCP AtlasHy3-preview by 3.875.379.1+3.8
- BrowseComptie84.484.2tie
ReasoningGPT-5.5
- CritPtGPT-5.5 by 22.227.14.9+22.2
- Humanity's Last ExamGPT-5.5 by 12.345.833.5+12.3
- GPQA DiamondGPT-5.5 by 3.893.589.7+3.8
FactsEven
- AA-Omniscience · AccuracyGPT-5.5 by 265832+26
- AA-Omniscience · Non-hallucinationHy3-preview by 14.91125.9+14.9
Other results8 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- DeepSWEGPT-5.5 by 427028+42
- AA-OmniscienceGPT-5.5 by 3920.5-18.5+39
- τ²-Bench Telecom (AA run)GPT-5.5 by 26.493.967.5+26.4
- Artificial Analysis Coding IndexGPT-5.5 by 16.174.958.8+16.1
- AA IntelligenceGPT-5.5 by 13.138.425.3+13.1
- AA Agentic IndexGPT-5.5 by 11.737.325.6+11.7
- ToolathlonGPT-5.5 by 7.155.648.5+7.1
- NL2RepoGPT-5.5 by 5.150.745.6+5.1
Questions people ask
Which is better, GPT-5.5 or Hy3-preview?
GPT-5.5 wins five of the six areas where both have results: coding, agents, reasoning, long documents and following instructions. Hy3-preview wins none, but costs 98% less. They are level on facts.
Which is better for coding?
GPT-5.5. It wins 3 of the 5 coding tests both models report; Hy3-preview wins none, and 2 are ties.
Which is cheaper?
GPT-5.5 costs $5.00 per million input tokens and $30.00 per million output tokens; Hy3-preview costs $0.14 and $0.56. That makes Hy3-preview about 98% cheaper for the same work.
How do you compare the two?
We use the 26 benchmark tests both models have published scores on. The verdict counts the 18 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 8 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.