Anthropic: Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade.
AnthropicClaude Sonnet 5.5
anthropic/claude-sonnet-5.5Intelligence index
54.5
Artificial Analysis
Design Arena
1338 Elo · #2
codetovideo · 71.2% wins
Input
$2
per 1M tokens
Output
$10
per 1M tokens
Cached input
$0.10
per 1M tokens
Context
1M
tokens it reads
Max output
128K
tokens it writes
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
inspect — the catalog entry
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"hugging_face_id": null,
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"context_length": 1000000,
"architecture": {
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"input_modalities": [
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"output_modalities": [
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"tokenizer": "Claude",
"instruct_type": null
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"pricing": {
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"completion": "0.00001",
"web_search": "0.01",
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"input_cache_write": "0.0000025",
"input_cache_write_1h": "0.000004"
},
"top_provider": {
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"is_moderated": true
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"per_request_limits": null,
"supported_parameters": [
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"default_parameters": {},
"supported_voices": null,
"knowledge_cutoff": null,
"expiration_date": null,
"links": {
"details": "/api/v1/models/anthropic/claude-sonnet-5.5-20260928/endpoints"
},
"endpoints": [
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"/api/v1/completions",
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"benchmarks": {
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"category": "blender3d",
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"win_rate": 64.5,
"rank": 4
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{
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"category": "codetovideo",
"elo": 1338,
"win_rate": 71.2,
"rank": 2
},
{
"arena": "agents",
"category": "mobileapps",
"elo": 1266,
"win_rate": 57.6,
"rank": 4
},
{
"arena": "agents",
"category": "pdf",
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{
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{
"arena": "models",
"category": "dataviz",
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"win_rate": 65.1,
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},
{
"arena": "models",
"category": "gamedev",
"elo": 1407,
"win_rate": 61.9,
"rank": 5
},
{
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"category": "uicomponent",
"elo": 1376,
"win_rate": 63.5,
"rank": 3
},
{
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"category": "website",
"elo": 1318,
"win_rate": 54.6,
"rank": 6
}
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"artificial_analysis": {
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"reasoning": {
"mandatory": true,
"supported_efforts": [
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"default_effort": "high"
}
}References (1)
- Stored model catalog — Nov 6, 2026