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Anthropic: Claude Sonnet 4.5

anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...

Input modalitiesT
Output modalitiesT
Source-linkedClosed weights
Report data
Context window1M
Maximum output64K
Provider offers0
Knowledge cutoffUndisclosed
Capabilities

What this model supports

ReasoningNo
Tool callingNo
Structured outputNo
AttachmentsNo
Temperature controlNo
Open weightsNo
Creator
Anthropic
Family
Not documented
Modalities
File, Image, Text
License
Not documented
Release date
Not documented
Model ID
anthropic/claude-sonnet-4.5
Market availability

Provider pricing

Report price →
No known providers available.
Evidence

Published benchmark results

Agentic Index vs top 8 models
GPT-5.6 Sol
54.0
Claude Fable 5
52.8
GPT-5.6 Terra
47.4
Anthropic: Claude Opus 4.8
47.2
Claude Sonnet 5
46.7
xAI: Grok 4.5
45.7
GPT-5.6 Luna
45.6
Anthropic: Claude Sonnet 4.5
24.6
Coding Index vs top 8 models
GPT-5.6 Sol
77.4
GPT-5.6 Terra
76.7
Claude Fable 5
76.5
GPT-5.5
74.9
Anthropic: Claude Opus 4.8
74.3
Anthropic: Claude Opus 4.7
73.6
xAI: Grok 4.5
72.4
Anthropic: Claude Sonnet 4.5
52.1
Design Arena: 3d vs top 8 models
Z.ai: GLM 5.2
1371.0
Claude Fable 5
1366.0
Anthropic: Claude Opus 4.6
1349.0
Kimi K2.6
1348.0
xAI: Grok 4.5
1338.0
Z.ai: GLM 5.1
1336.0
DeepSeek V4 Pro
1326.0
Anthropic: Claude Sonnet 4.5
1231.0
Design Arena: asciiart vs top 8 models
Claude Fable 5
1374.0
Anthropic: Claude Opus 4.7
1324.0
Gemini 3.1 Pro Preview
1313.0
Anthropic: Claude Opus 4.8
1308.0
Gemini 3.5 Flash
1305.0
Anthropic: Claude Opus 4.6
1303.0
GPT-5.5
1296.0
Anthropic: Claude Sonnet 4.5
1242.0
Design Arena: codecategories vs top 8 models
Z.ai: GLM 5.2
1351.0
Claude Fable 5
1345.0
Anthropic: Claude Opus 4.6
1336.0
Anthropic: Claude Opus 4.7
1330.0
xAI: Grok 4.5
1327.0
Z.ai: GLM 5.1
1321.0
Kimi K2.6
1320.0
Anthropic: Claude Sonnet 4.5
1225.0
Design Arena: dataviz vs top 8 models
Z.ai: GLM 5.1
1366.0
Claude Fable 5
1363.0
xAI: Grok 4.5
1330.0
Anthropic: Claude Opus 4.6
1322.0
Anthropic: Claude Opus 4.7
1322.0
Z.ai: GLM 5.2
1316.0
Anthropic: Claude Sonnet 4.6
1316.0
Anthropic: Claude Sonnet 4.5
1209.0
Design Arena: fullstack vs top 8 models
Anthropic: Claude Opus 4.7
1503.0
Anthropic: Claude Opus 4.8
1321.0
Claude Fable 5
1309.0
Claude Sonnet 5
1298.0
Z.ai: GLM 5.2
1295.0
Anthropic: Claude Opus 4.6
1283.0
Anthropic: Claude Sonnet 4.6
1268.0
Anthropic: Claude Sonnet 4.5
1115.0
Design Arena: gamedev vs top 8 models
Claude Fable 5
1383.0
Z.ai: GLM 5.2
1353.0
Claude Sonnet 5
1345.0
GPT-5.5
1344.0
Anthropic: Claude Opus 4.6
1339.0
Anthropic: Claude Opus 4.7
1336.0
MiMo-V2.5-Pro
1334.0
Anthropic: Claude Sonnet 4.5
1228.0
Design Arena: mobileapps vs top 8 models
Anthropic: Claude Opus 4.8
1287.0
Claude Fable 5
1281.0
MiniMax: MiniMax M3
1271.0
Gemini 3.5 Flash
1259.0
Anthropic: Claude Opus 4.6
1259.0
Anthropic: Claude Sonnet 4.6
1255.0
Z.ai: GLM 5.2
1243.0
Anthropic: Claude Sonnet 4.5
1182.0
Design Arena: svg vs top 8 models
Claude Fable 5
1365.0
Gemini 3.1 Pro Preview
1340.0
Gemini 3.5 Flash
1297.0
Anthropic: Claude Opus 4.6
1278.0
GPT-5.5
1277.0
Anthropic: Claude Opus 4.7
1274.0
Z.ai: GLM 5.1
1273.0
Anthropic: Claude Sonnet 4.5
1165.0
Design Arena: uicomponent vs top 8 models
Claude Fable 5
1401.0
Anthropic: Claude Opus 4.7
1359.0
Anthropic: Claude Opus 4.6
1343.0
Z.ai: GLM 5.2
1335.0
Z.ai: GLM 5.1
1331.0
Qwen: Qwen3.7 Max
1330.0
Anthropic: Claude Sonnet 4.6
1320.0
Anthropic: Claude Sonnet 4.5
1225.0
Design Arena: webapps vs top 8 models
Claude Sonnet 5
1346.0
Claude Fable 5
1333.0
Anthropic: Claude Opus 4.7
1325.0
Anthropic: Claude Opus 4.8
1286.0
Z.ai: GLM 5.2
1278.0
xAI: Grok 4.5
1268.0
Qwen: Qwen3.7 Max
1264.0
Anthropic: Claude Sonnet 4.5
1124.0
Design Arena: website vs top 8 models
Z.ai: GLM 5.2
1346.0
Claude Fable 5
1338.0
Anthropic: Claude Opus 4.6
1331.0
Anthropic: Claude Opus 4.7
1329.0
xAI: Grok 4.5
1325.0
Anthropic: Claude Sonnet 4.6
1320.0
Claude Sonnet 5
1314.0
Anthropic: Claude Sonnet 4.5
1224.0
Intelligence Index vs top 8 models
Claude Fable 5
59.9
GPT-5.6 Sol
58.9
Anthropic: Claude Opus 4.8
55.7
GPT-5.6 Terra
55.0
GPT-5.5
54.8
xAI: Grok 4.5
53.8
Anthropic: Claude Opus 4.7
53.5
Anthropic: Claude Sonnet 4.5
36.4