GPT-5.4 Pro vs GPT-5.5 Pro
Change modelsGPT-5.4 ProOpenAI
GPT-5.5 ProOpenAI
IndexAll categories, out of 100.
73.3 ±8.7
74.8 ±8.7 best
GapIndex points below the top.
−1.5 · no clear gap
Top
CoverageIndex weight that has results.
60%
60%
SpeedOutput tokens per second.
21/s best
19/s
EloLMArena rating and rank.
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ReleasedMonth of release.
2026-03
2026-04
Input / 1MUS dollars per 1M input tokens.
$30.00
$30.00
Output / 1MUS dollars per 1M output tokens.
$180.00
$180.00
Batch output / 1MBatch price per 1M output tokens.
$90.00
$90.00
1K chats2K tokens in, 500 out, each.
$150.00
$150.00
1K documents20K tokens in, 1K out, each.
$780.00
$780.00
1K agent tasks200K tokens in, 20K out, each.
$9,600.00
$9,600.00
ContextMaximum tokens in one request.
1.05M
1.05M
AgenticMulti-step tasks with tools.
70.5
71.1 best
CodingCode writing and repair.
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ReasoningLogic problems and puzzles.
80.4
81.1 best
MultimodalTasks with images and text.
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KnowledgeFacts and expert knowledge.
67.2
69.0 best
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
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MathMath problems.
75.3
76.3 best
Benchmarks
14 sharedOnly GPT-5.4 Pro: 4Only GPT-5.5 Pro: 1
GPT-5.4 Pro
GPT-5.5 Pro