Claude Opus 5.5 vs Claude Sonnet 5.5
Change modelsClaude Opus 5.5Anthropic
Claude Sonnet 5.5Anthropic
IndexAll categories, out of 100.
78.6 ±2.4 best
77.2 ±2.6
GapIndex points below the top.
Top
−1.4 · no clear gap
CoverageIndex weight that has results.
95%
95%
SpeedOutput tokens per second.
76/s
107/s best
EloLMArena rating and rank.
1513 best
1469
ReleasedMonth of release.
2026-09
2026-09
Input / 1MUS dollars per 1M input tokens.
$4.00
$2.00 best
Output / 1MUS dollars per 1M output tokens.
$20.00
$10.00 best
Batch output / 1MBatch price per 1M output tokens.
$10.00
$5.00 best
1K chats2K tokens in, 500 out, each.
$18.00
$9.00 best
1K documents20K tokens in, 1K out, each.
$100.00
$50.00 best
1K agent tasks200K tokens in, 20K out, each.
$1,200.00
$600.00 best
ContextMaximum tokens in one request.
1M
1M
AgenticMulti-step tasks with tools.
74.1
77.5 best
CodingCode writing and repair.
81.8 best
80.8
ReasoningLogic problems and puzzles.
80.8 best
77.8
MultimodalTasks with images and text.
74.1
74.4 best
KnowledgeFacts and expert knowledge.
79.2 best
71.3
MultilingualTasks in many languages.
—
—
InstructionTasks with strict prompt rules.
59.6 best
41.5
MathMath problems.
77.7 best
76.1
Benchmarks
126 sharedOnly Claude Opus 5.5: 31Only Claude Sonnet 5.5: 2
Claude Opus 5.5
Claude Sonnet 5.5