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Claude Sonnet 4.5

anthropic/claude-sonnet-4-5-20250929

Balanced Claude model for coding, analysis, agent workflows, and cost control

Source-linkedclaude-sonnetClosed weightsReleased 2025-09-29
Report data
Context window200K
Maximum output64K
Provider offers16
Knowledge cutoff2025-07-31
Capabilities

What this model supports

ReasoningYes
Tool callingYes
Structured outputNo
AttachmentsYes
Temperature controlYes
Open weightsNo
Creator
Anthropic
Family
claude-sonnet
Modalities
Image, Pdf, Text
License
Not documented
Release date
2025-09-29
Model ID
anthropic/claude-sonnet-4-5-20250929
Market availability

Provider pricing

Report price →
Providers offering Claude Sonnet 4.5
ProviderProvider model IDContextInput / 1MOutput / 1MCached / 1MFeaturesAll pricing
QiHangclaude-sonnet-4-5-20250929200K$0.430$2.140R T ·
View
{
  "input": 0.43,
  "output": 2.14
}
Merge Gatewayanthropic/claude-sonnet-4-5-20250929200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Vercel AI Gatewayanthropic/claude-sonnet-4.51M$3.000$15.000$0.300R T S
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
DigitalOceananthropic-claude-4.5-sonnet1M$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "context_over_200k": {
    "cache_read": 0.3,
    "cache_write": 3.75,
    "input": 6,
    "output": 22.5
  },
  "input": 3,
  "output": 15,
  "tiers": [
    {
      "cache_read": 0.3,
      "cache_write": 3.75,
      "input": 6,
      "output": 22.5,
      "tier": {
        "size": 200000,
        "type": "context"
      }
    }
  ]
}
LLM Gatewayclaude-sonnet-4-5-20250929200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Vertex (Anthropic)claude-sonnet-4-5@20250929200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Anthropicclaude-sonnet-4-5-202509291M$3.000$15.000$0.300R T S
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
OpenCode Zenclaude-sonnet-4-51M$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "context_over_200k": {
    "cache_read": 0.6,
    "cache_write": 7.5,
    "input": 6,
    "output": 22.5
  },
  "input": 3,
  "output": 15,
  "tiers": [
    {
      "cache_read": 0.6,
      "cache_write": 7.5,
      "input": 6,
      "output": 22.5,
      "tier": {
        "size": 200000,
        "type": "context"
      }
    }
  ]
}
Amazon Bedrockanthropic.claude-sonnet-4-5-20250929-v1:0200K$3.000$15.000$0.300R T S
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Databricksdatabricks-claude-sonnet-4200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Azure Cognitive Servicesclaude-sonnet-4-5200K$3.000$15.000$0.300R T S
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Vertexclaude-sonnet-4-5@20250929200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Neonclaude-sonnet-4200K$3.000$15.000$0.300R T ·
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Azureclaude-sonnet-4-5200K$3.000$15.000$0.300R T S
View
{
  "cache_read": 0.3,
  "cache_write": 3.75,
  "input": 3,
  "output": 15
}
Abacusclaude-sonnet-4-5-20250929200K$3.000$15.000R T ·
View
{
  "input": 3,
  "output": 15
}
Venice AIclaude-sonnet-4-5198K$3.750$18.750$0.375R T S
View
{
  "cache_read": 0.375,
  "cache_write": 4.69,
  "input": 3.75,
  "output": 18.75
}
Evidence

Published benchmark results

Insufficient benchmark coverage. ModelBench does not infer a score from price, context size, or model name.