Gemini 3.8 Flash vs GPT-5.5 Pro
Change modelsGemini 3.8 FlashGoogle
GPT-5.5 ProOpenAI
IndexAll categories, out of 100.
67.8 ±2.5
74.8 ±8.7 best
GapIndex points below the top.
−7.0 · no clear gap
Top
CoverageIndex weight that has results.
95% best
60%
SpeedOutput tokens per second.
68/s best
19/s
EloLMArena rating and rank.
1500
—
ReleasedMonth of release.
2026-09
2026-04
Input / 1MUS dollars per 1M input tokens.
$0.825 best
$30.00
Output / 1MUS dollars per 1M output tokens.
$4.13 best
$180.00
Batch output / 1MBatch price per 1M output tokens.
$1.88 best
$90.00
1K chats2K tokens in, 500 out, each.
$3.71 best
$150.00
1K documents20K tokens in, 1K out, each.
$20.63 best
$780.00
1K agent tasks200K tokens in, 20K out, each.
$247.50 best
$9,600.00
ContextMaximum tokens in one request.
1.05M
1.05M
AgenticMulti-step tasks with tools.
65.3
71.1 best
CodingCode writing and repair.
66.2
—
ReasoningLogic problems and puzzles.
68.3
81.1 best
MultimodalTasks with images and text.
67.1
—
KnowledgeFacts and expert knowledge.
70.9 best
69.0
MultilingualTasks in many languages.
—
—
InstructionTasks with strict prompt rules.
91.3
—
MathMath problems.
64.3
76.3 best
Benchmarks
10 sharedOnly Gemini 3.8 Flash: 96Only GPT-5.5 Pro: 5
Gemini 3.8 Flash
GPT-5.5 Pro