Gemini 4 Carbon vs GPT-5.5

Change models
GPT-5.5OpenAI
IndexAll categories, out of 100.
82.7 ±5.1 best
69.1 ±2.5
GapIndex points below the top.
Top
−13.6
CoverageIndex weight that has results.
80%
95% best
SpeedOutput tokens per second.
31/s
52/s best
EloLMArena rating and rank.
1538 best
1466
ReleasedMonth of release.
2026-10
2026-04
Input / 1MUS dollars per 1M input tokens.
$2.00 best
$5.00
Output / 1MUS dollars per 1M output tokens.
$10.00 best
$30.00
Batch output / 1MBatch price per 1M output tokens.
$5.00 best
$15.00
1K chats2K tokens in, 500 out, each.
$9.00 best
$25.00
1K documents20K tokens in, 1K out, each.
$50.00 best
$130.00
1K agent tasks200K tokens in, 20K out, each.
$600.00 best
$1,600.00
ContextMaximum tokens in one request.
1.05M
1.05M
AgenticMulti-step tasks with tools.
83.2 best
65.8
CodingCode writing and repair.
80.5 best
65.5
ReasoningLogic problems and puzzles.
83.9 best
74.1
MultimodalTasks with images and text.
—
66.8
KnowledgeFacts and expert knowledge.
79.5 best
70.4
MultilingualTasks in many languages.
—
—
InstructionTasks with strict prompt rules.
—
64.8
MathMath problems.
77.2 best
74.7

Benchmarks

22 shared
Only Gemini 4 Carbon: 17Only GPT-5.5: 90
Gemini 4 Carbon
GPT-5.5
79.3%52 / 217
84.3% best7 / 217
96.5% best1 / 217
94.0%13 / 217
100.0%1 / 200
100.0%1 / 200
58.3% best9 / 164
58.0%10 / 164
92.1% best5 / 131
85.0%13 / 131
97.5% best5 / 126
95.0%19 / 126
89.1% best9 / 123
69.8%50 / 123
97.9% best3 / 122
90.6%14 / 122
98.5% best6 / 116
97.5%19 / 116
77.7% best2 / 91
63.0%16 / 91
Chess PuzzlesReasoning
78.0% best2 / 90
63.0%7 / 90
90.5% best6 / 90
85.3%16 / 90
55.8% best1 / 90
40.4%35 / 90
51.8% best1 / 82
21.8%49 / 82
73.0% best5 / 80
56.0%12 / 80
95.1% best4 / 72
72.5%16 / 72
77.5% best6 / 37
44.2%16 / 37
EBR-benchReasoning
87.6% best2 / 31
34.3%14 / 31
40.0% best5 / 27
22.6%18 / 27
63.9% best2 / 26
0.4%18 / 26