Catalog Changes · 2026-10-15 06:04:01.957457
Anthropic: Claude Opus 5.5 · 2026-10-15 06:04:01.957457 UTC
Current Model ListingOpenRouter
11 Changed Fields
| Field / Array Position | Previous Value | Observed Value |
|---|---|---|
| Benchmarks · Design Arena[1] · Win Rate | 72.2 | 72.1 |
| Benchmarks · Design Arena[3] · Win Rate | 64.7 | 64.8 |
| Benchmarks · Design Arena[4] · Rank | 1 | 2 |
| Benchmarks · Design Arena[5] · Elo | 1333 | 1332 |
| Benchmarks · Design Arena[5] · Win Rate | 51.5 | 51.8 |
| Benchmarks · Design Arena[6] · Elo | 1384 | 1380 |
| Benchmarks · Design Arena[6] · Rank | 2 | 3 |
| Benchmarks · Design Arena[6] · Win Rate | 63.8 | 63.3 |
| Benchmarks · Design Arena[7] · Elo | 1335 | 1336 |
| Benchmarks · Design Arena[7] · Rank | 4 | 3 |
| Benchmarks · Design Arena[7] · Win Rate | 57.4 | 57.5 |
Anthropic: Claude Opus 5.5
anthropic/claude-opus-5.5
OpenRouter Catalog ChangesLast Observed: 2026-10-15 06:04:01.957457 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...
- Context Tokens: 1000000
- Input Price (Native Units): 0.000004
- Output Price (Native Units): 0.00002
- Output Token Limit: 128000
- Find Similar · At Least This Context And The Same Reported Modality
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 Explicit Null |
Explicit Null |
|---|---|
Benchmarks · Artificial Analysis · Coding Index
API Details/benchmarks/artificial_analysis/coding_index Explicit Null |
Explicit Null |
Benchmarks · Artificial Analysis · Intelligence Index
API Details/benchmarks/artificial_analysis/intelligence_index 57.6 |
57.6 |
Catalog Identity And Metadata · 11
Canonical Slug
API Details/canonical_slug anthropic/claude-opus-5.5-20260921 |
anthropic/claude-opus-5.5-20260921 |
|---|---|
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 |
Hugging Face Id
API Details/hugging_face_id Explicit Null |
Explicit Null |
Id
API Details/id anthropic/claude-opus-5.5 |
anthropic/claude-opus-5.5 |
Knowledge Cutoff
API Details/knowledge_cutoff Explicit Null |
Explicit Null |
Links · Details
API Details/links/details /api/v1/models/anthropic/claude-opus-5.5-20260921/endpoints |
/api/v1/models/anthropic/claude-opus-5.5-20260921/endpoints |
Name
API Details/name Anthropic: Claude Opus 5.5 |
Anthropic: Claude Opus 5.5 |
Supported Voices
API Details/supported_voices Explicit Null |
Explicit Null |
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 · 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 |
Pricing · Input Cache Write 1h
API Details/pricing/input_cache_write_1h 0.000008 |
0.000008 |
Input Price · USD/Token
API Details/pricing/prompt 0.000004 |
0.000004 |
Pricing · Web Search
API Details/pricing/web_search 0.01 |
0.01 |
Reasoning · 2
Reasoning · Default Effort
API Details/reasoning/default_effort high |
high |
|---|---|
Reasoning · Mandatory
API Details/reasoning/mandatory True |
True |
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 |
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 |
Reasoning
API Details/reasoning Object · See Fields |
Object · See Fields |
Reasoning · Supported Efforts
API Details/reasoning/supported_efforts Array · See Items |
Array · See Items |
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
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 |
Benchmarks · Design Arena
8 items · source order preserved
| Item | Arena | Category | Elo | Rank | Win Rate |
|---|---|---|---|---|---|
| 1 | agents | mobileapps | 1327 | 2 | 64.2 |
| 2 | models | 3d | 1479 | 1 | 72.1 |
| 3 | models | codecategories | 1392 | 1 | 63.8 |
| 4 | models | dataviz | 1400 | 1 | 64.8 |
| 5 | models | gamedev | 1458 | 2 | 71.7 |
| 6 | models | svg | 1332 | 1 | 51.8 |
| 7 | models | uicomponent | 1380 | 3 | 63.3 |
| 8 | models | website | 1336 | 3 | 57.5 |
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 | agents | mobileapps | 1327 | 2 | 64.2 |
| 2 | models | 3d | 1479 | 1 | 72.1 |
| 3 | models | codecategories | 1392 | 1 | 63.8 |
| 4 | models | dataviz | 1400 | 1 | 64.8 |
| 5 | models | gamedev | 1458 | 2 | 71.7 |
| 6 | models | svg | 1332 | 1 | 51.8 |
| 7 | models | uicomponent | 1380 | 3 | 63.3 |
| 8 | models | website | 1336 | 3 | 57.5 |
Reasoning · Supported Efforts
5 items · source order preserved
- max
- xhigh
- high
- medium
- low
API Details
| Item | /reasoning/supported_efforts/* |
|---|---|
| 1 | max |
| 2 | xhigh |
| 3 | high |
| 4 | medium |
| 5 | low |