GPT-5.4 nano vs GPT-5.5 Pro
Change modelsGPT-5.4 nanoOpenAI
GPT-5.5 ProOpenAI
IndexAll categories, out of 100.
50.9 ±2.5
74.8 ±8.7 best
GapIndex points below the top.
−23.9
Top
CoverageIndex weight that has results.
100% best
60%
SpeedOutput tokens per second.
91/s best
19/s
EloLMArena rating and rank.
1372
—
ReleasedMonth of release.
2026-03
2026-04
Input / 1MUS dollars per 1M input tokens.
$0.20 best
$30.00
Output / 1MUS dollars per 1M output tokens.
$1.25 best
$180.00
Batch output / 1MBatch price per 1M output tokens.
$0.625 best
$90.00
1K chats2K tokens in, 500 out, each.
$1.03 best
$150.00
1K documents20K tokens in, 1K out, each.
$5.25 best
$780.00
1K agent tasks200K tokens in, 20K out, each.
$65.00 best
$9,600.00
ContextMaximum tokens in one request.
400K
1.05M best
AgenticMulti-step tasks with tools.
50.5
71.1 best
CodingCode writing and repair.
53.7
—
ReasoningLogic problems and puzzles.
53.7
81.1 best
MultimodalTasks with images and text.
41.7
—
KnowledgeFacts and expert knowledge.
44.5
69.0 best
MultilingualTasks in many languages.
44.4
—
InstructionTasks with strict prompt rules.
61.3
—
MathMath problems.
55.9
76.3 best
Benchmarks
14 sharedOnly GPT-5.4 nano: 60Only GPT-5.5 Pro: 1
GPT-5.4 nano
GPT-5.5 Pro