Anthropic: Claude Sonnet 4.5

anthropic/claude-sonnet-4.5

Last Observed: 2026-10-15 06:03:59.618594 UTC

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...

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Architecture And Modalities · 3

Architecture · Instruct Type API Details /architecture/instruct_type Explicit Null	Explicit Null
Architecture · Modality API Details /architecture/modality text+image+file->text	text+image+file->text
Architecture · Tokenizer API Details /architecture/tokenizer Claude	Claude

Benchmarks · 3

Benchmarks · Artificial Analysis · Agentic Index API Details /benchmarks/artificial_analysis/agentic_index 15.8	15.8
Benchmarks · Artificial Analysis · Coding Index API Details /benchmarks/artificial_analysis/coding_index 52.1	52.1
Benchmarks · Artificial Analysis · Intelligence Index API Details /benchmarks/artificial_analysis/intelligence_index 20.7	20.7

Catalog Identity And Metadata · 11

Canonical Slug API Details /canonical_slug anthropic/claude-4.5-sonnet-20250929	anthropic/claude-4.5-sonnet-20250929
Context Tokens API Details /context_length 1000000	1,000,000
Created API Details /created 1759161676	2025-09-29 16:01:16 UTC
Description API Details /description 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...	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...
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Hugging Face Id API Details /hugging_face_id Empty String	Empty String
Id API Details /id anthropic/claude-sonnet-4.5	anthropic/claude-sonnet-4.5
Knowledge Cutoff API Details /knowledge_cutoff 2025-01-31	2025-01-31
Links · Details API Details /links/details /api/v1/models/anthropic/claude-4.5-sonnet-20250929/endpoints	/api/v1/models/anthropic/claude-4.5-sonnet-20250929/endpoints
Name API Details /name Anthropic: Claude Sonnet 4.5	Anthropic: Claude Sonnet 4.5
Supported Voices API Details /supported_voices Explicit Null	Explicit Null

Default Parameters · 6

Default Parameters · Frequency Penalty API Details /default_parameters/frequency_penalty Explicit Null	Explicit Null
Default Parameters · Presence Penalty API Details /default_parameters/presence_penalty Explicit Null	Explicit Null
Default Parameters · Repetition Penalty API Details /default_parameters/repetition_penalty Explicit Null	Explicit Null
Default Parameters · Temperature API Details /default_parameters/temperature 1	1
Default Parameters · Top K API Details /default_parameters/top_k Explicit Null	Explicit Null
Default Parameters · Top P API Details /default_parameters/top_p 1	1

Request Limits · 1

Per Request Limits API Details /per_request_limits Explicit Null	Explicit Null

Pricing · 6

Output Price · USD/Token API Details /pricing/completion 0.000015	0.000015
Pricing · Input Cache Read API Details /pricing/input_cache_read 0.0000003	0.0000003
Pricing · Input Cache Write API Details /pricing/input_cache_write 0.00000375	0.00000375
Pricing · Input Cache Write 1h API Details /pricing/input_cache_write_1h 0.000006	0.000006
Input Price · USD/Token API Details /pricing/prompt 0.000003	0.000003
Pricing · Web Search API Details /pricing/web_search 0.01	0.01

Reasoning · 1

Reasoning · Mandatory API Details /reasoning/mandatory False	False

Provider Limits · 3

Top Provider · Context Length API Details /top_provider/context_length 1000000	1,000,000
Top Provider · Is Moderated API Details /top_provider/is_moderated True	True
Top Provider · Max Completion Tokens API Details /top_provider/max_completion_tokens 64000	64,000

API Structure And Container Types

Architecture API Details /architecture Object · See Fields	Object · See Fields
Architecture · Input Modalities API Details /architecture/input_modalities Array · See Items	Array · See Items
Architecture · Output Modalities API Details /architecture/output_modalities Array · See Items	Array · See Items
Benchmarks API Details /benchmarks Object · See Fields	Object · See Fields
Benchmarks · Artificial Analysis API Details /benchmarks/artificial_analysis Object · See Fields	Object · See Fields
Benchmarks · Design Arena API Details /benchmarks/design_arena Array · See Items	Array · See Items
Default Parameters API Details /default_parameters Object · See Fields	Object · See Fields
Links API Details /links Object · See Fields	Object · See Fields
Pricing API Details /pricing Object · See Fields	Object · See Fields
Pricing · Overrides API Details /pricing/overrides Array · See Items	Array · See Items
Reasoning API Details /reasoning Object · See Fields	Object · See Fields
Supported Parameters API Details /supported_parameters Array · See Items	Array · See Items
Top Provider API Details /top_provider Object · See Fields	Object · See Fields

Architecture · Input Modalities

3 items · source order preserved

text
image
file

API Details

Item	/architecture/input_modalities/*
1	text
2	image
3	file

Architecture · Output Modalities

1 items · source order preserved

text

API Details

Item	/architecture/output_modalities/*
1	text

Supported Parameters

12 items · source order preserved

include_reasoning
max_completion_tokens
max_tokens
reasoning
response_format
stop
structured_outputs
temperature
tool_choice
tools
top_k
top_p

API Details

Item	/supported_parameters/*
1	include_reasoning
2	max_completion_tokens
3	max_tokens
4	reasoning
5	response_format
6	stop
7	structured_outputs
8	temperature
9	tool_choice
10	tools
11	top_k
12	top_p

Benchmarks · Design Arena

11 items · source order preserved

Item	Arena	Category	Elo	Rank	Win Rate
1	models	3d	1158	65	51
2	models	asciiart	1207	22	56.1
3	models	codecategories	1184	62	51.5
4	models	dataviz	1169	69	47.4
5	models	gamedev	1169	65	51.1
6	models	svg	1113	56	52.2
7	models	uicomponent	1174	66	49.5
8	models	website	1191	66	51.8
9	agents	fullstack	1050	35	43.7
10	agents	mobileapps	1134	31	52.9
11	agents	webapps	1053	37	43.2

API Details

Item	/benchmarks/design_arena/*/arena	/benchmarks/design_arena/*/category	/benchmarks/design_arena/*/elo	/benchmarks/design_arena/*/rank	/benchmarks/design_arena/*/win_rate
1	models	3d	1158	65	51
2	models	asciiart	1207	22	56.1
3	models	codecategories	1184	62	51.5
4	models	dataviz	1169	69	47.4
5	models	gamedev	1169	65	51.1
6	models	svg	1113	56	52.2
7	models	uicomponent	1174	66	49.5
8	models	website	1191	66	51.8
9	agents	fullstack	1050	35	43.7
10	agents	mobileapps	1134	31	52.9
11	agents	webapps	1053	37	43.2

Pricing · Overrides

1 items · source order preserved

Item 1

Completion: 0.0000225
Input Cache Read: 0.0000006
Input Cache Write: 0.0000075
Input Cache Write 1h: 0.000012
Min Prompt Tokens: 200000
Prompt: 0.000006

API Details

Item	/pricing/overrides/*/completion	/pricing/overrides/*/input_cache_read	/pricing/overrides/*/input_cache_write	/pricing/overrides/*/input_cache_write_1h	/pricing/overrides/*/min_prompt_tokens	/pricing/overrides/*/prompt
1	0.0000225	0.0000006	0.0000075	0.000012	200000	0.000006

Recorded Value History

Historical API Field

Input Price · USD/Token

5 of 5 records plotted · 0 excluded for missing or invalid coordinates.

Up to 100 recorded versions, spaced by observation order rather than elapsed time. Array fields use the minimum numeric item in each version. Missing values are omitted. Select a point to open its archived snapshot; comparison actions use the current listing. History begins at the first recorded baseline.

Axis Scale

Select a point to open its listing or add it to compare.

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