Anthropic: Claude Opus 5.5

anthropic/claude-opus-5.5

Last Observed: 2026-10-15 06:04:16.393291 UTC

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

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Architecture And Modalities · 2

Architecture · Modality API Details /architecture/modality text+image+file->text	text+image+file->text
Architecture · Tokenizer API Details /architecture/tokenizer Claude	Claude

Catalog Identity And Metadata · 25

Context Tokens API Details /context_length 1000000	1,000,000
Created API Details /created 1790094732	2026-09-22 16:32:12 UTC
Description API Details /description Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...	Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Expiration Date API Details /expiration_date Explicit Null	Explicit Null
Id API Details /id anthropic/claude-opus-5.5	anthropic/claude-opus-5.5
Is Free API Details /isFree False	False
May Train On Your Prompts API Details /mayTrainOnYourPrompts False	False
Name API Details /name Anthropic: Claude Opus 5.5	Anthropic: Claude Opus 5.5
Opencode · Ai Sdk Provider API Details /opencode/ai_sdk_provider anthropic	anthropic
Opencode · Variants · High · Reasoning · Effort API Details /opencode/variants/high/reasoning/effort high	high
Opencode · Variants · High · Reasoning · Enabled API Details /opencode/variants/high/reasoning/enabled True	True
Opencode · Variants · High · Verbosity API Details /opencode/variants/high/verbosity high	high
Opencode · Variants · Low · Reasoning · Effort API Details /opencode/variants/low/reasoning/effort low	low
Opencode · Variants · Low · Reasoning · Enabled API Details /opencode/variants/low/reasoning/enabled True	True
Opencode · Variants · Low · Verbosity API Details /opencode/variants/low/verbosity low	low
Opencode · Variants · Max · Reasoning · Effort API Details /opencode/variants/max/reasoning/effort max	max
Opencode · Variants · Max · Reasoning · Enabled API Details /opencode/variants/max/reasoning/enabled True	True
Opencode · Variants · Max · Verbosity API Details /opencode/variants/max/verbosity max	max
Opencode · Variants · Medium · Reasoning · Effort API Details /opencode/variants/medium/reasoning/effort medium	medium
Opencode · Variants · Medium · Reasoning · Enabled API Details /opencode/variants/medium/reasoning/enabled True	True
Opencode · Variants · Medium · Verbosity API Details /opencode/variants/medium/verbosity medium	medium
Opencode · Variants · Xhigh · Reasoning · Effort API Details /opencode/variants/xhigh/reasoning/effort xhigh	xhigh
Opencode · Variants · Xhigh · Reasoning · Enabled API Details /opencode/variants/xhigh/reasoning/enabled True	True
Opencode · Variants · Xhigh · Verbosity API Details /opencode/variants/xhigh/verbosity xhigh	xhigh
Preferred Index API Details /preferredIndex 4	4

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 0.00002	0.00002
Pricing · Discount API Details /pricing/discount 0	0
Pricing · Input Cache Read API Details /pricing/input_cache_read 0.0000002	0.0000002
Pricing · Input Cache Write API Details /pricing/input_cache_write 0.000005	0.000005
Input Price · USD/Token API Details /pricing/prompt 0.000004	0.000004
Pricing · Web Search API Details /pricing/web_search 0.01	0.01

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 128000	128,000

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
Opencode API Details /opencode Object · See Fields	Object · See Fields
Opencode · Variants API Details /opencode/variants Object · See Fields	Object · See Fields
Opencode · Variants · High API Details /opencode/variants/high Object · See Fields	Object · See Fields
Opencode · Variants · High · Reasoning API Details /opencode/variants/high/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · Low API Details /opencode/variants/low Object · See Fields	Object · See Fields
Opencode · Variants · Low · Reasoning API Details /opencode/variants/low/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · Max API Details /opencode/variants/max Object · See Fields	Object · See Fields
Opencode · Variants · Max · Reasoning API Details /opencode/variants/max/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · Medium API Details /opencode/variants/medium Object · See Fields	Object · See Fields
Opencode · Variants · Medium · Reasoning API Details /opencode/variants/medium/reasoning Object · See Fields	Object · See Fields
Opencode · Variants · Xhigh API Details /opencode/variants/xhigh Object · See Fields	Object · See Fields
Opencode · Variants · Xhigh · Reasoning API Details /opencode/variants/xhigh/reasoning Object · See Fields	Object · See Fields
Pricing API Details /pricing 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

4 items · source order preserved

text
image
file
pdf

API Details

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

Architecture · Output Modalities

1 items · source order preserved

text

API Details

Item	/architecture/output_modalities/*
1	text

Supported Parameters

11 items · source order preserved

include_reasoning
max_completion_tokens
max_tokens
reasoning
reasoning_effort
response_format
stop
structured_outputs
tool_choice
tools
verbosity

API Details

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

Recorded Value History

Historical API Field

Input Price · USD/Token

1 of 1 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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