What is the context window of Claude Opus 4.5?

Claude Opus 4.5 has a context window of 200K tokens.

How much does Claude Opus 4.5 cost?

Claude Opus 4.5 pricing ranges from $5/1M to $18.0/1M input tokens depending on the provider.

When was Claude Opus 4.5 released?

Claude Opus 4.5 was released on 2025-11-01.

Which providers offer Claude Opus 4.5?

Claude Opus 4.5 is available from 5 providers: Microsoft Foundry, Anthropic, GCP Vertex AI, AWS Bedrock, OpenRouter.

What benchmarks has Claude Opus 4.5 been tested on?

Claude Opus 4.5 has been evaluated on 7 benchmarks, including Massive Multi-discipline Multimodal Understanding, BFCL, SWE-bench Pro, MMLU PRO, Chatbot Arena.

Claude Opus 4.5

Name: Claude Opus 4.5
Author: Anthropic

claude-opus-4-5

Researched 29d ago

Last refreshed 2026-05-16. Next refresh: weekly.

MultimodalCodingRAGAgentsLong contextVisionClassificationJSON / Tool useHighlight

Claude Opus 4.5 is worth evaluating for coding, rag, and agents when its provider route and context window match the workload.
Decision context: Coding task fit, 5 tracked provider routes, and research from 2026-04-19.

Use it for

Teams evaluating coding, rag, and agents
Workloads that can use a 200K context window
Buyers comparing 4 tracked provider routes

Do not use it for

Workloads where another current model has stronger sourced task evidence

Cheapest output

$25.00

Anthropic per 1M tokens

Provider routes

Tracked API hosts

Quality / dollar

Grade D

Ranked by benchmark score divided by cheapest output price

Freshness

2026-04-19

Researched 29d ago

fresh

Top use-case fit

Coding

Q/$ D

3 relevant benchmarks in the decision map.

RAG

Included by capability and metadata signals in the decision map.

Agents

Q/$ D

1 relevant benchmark in the decision map.

Provider price ladder

Compare all 5

Provider	Input / 1M	Output / 1M	Batch in / out	Cache	Route
Anthropic	$5.00	$25.00	$2.50 / $12.50	-	Serverless
GCP Vertex AI	$5.00	$25.00	-	-	Serverless
Microsoft Foundry	$5.00	$25.00	-	read $0.500 / 5m $6.25 / 1h $10.00	ServerlessProvisioned
OpenRouter	$5.00	$25.00	-	-	Serverless

Benchmark peer barsfor Coding

SWE-bench ProRank 15 of 18

64.3

58.6

58.6

58.6

Claude Opus 4.5current

41.8

SWE-bench VerifiedRank 6 of 44

Claude Mythos Preview

93.9

GPT-5.5 Pro

88.7

GPT-5.5

88.7

Claude Opus 4.7

87.6

Claude Opus 4.5current

80.9

Aider PolyglotRank 7 of 29

GPT-5

88.0

o3-pro

84.9

81.3

Grok 4

79.6

Claude Opus 4.5current

72.0

Migration checks

No linked migration route is available for this model yet.

About

Claude Opus 4.5 available on AWS Bedrock

Claude Opus 4.5 has a 200K-token context window.

Claude Opus 4.5 input tokens at $5/1M, output at $25/1M.

Capabilities

VisionMultimodalReasoningFunction CallingTool UseStructured OutputsCode Execution

Benchmark Scores(7)

Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.

Benchmark	Score	Version	Source
Massive Multi-discipline Multimodal Understanding	80.7	—	https://mmmu-benchmark.github.io/
BFCL	77.5	—	https://gorilla.cs.berkeley.edu/leaderboard.html
SWE-bench Pro	41.8	—	DAT-1778
MMLU PRO	88.9	—	https://huggingface.co/spaces/TIGER-Lab/MMLU-Pro
Chatbot Arena	1466.0	Thinking 32K	https://arena.ai/leaderboard
Aider Polyglot	72.0	2026-05 (32k thinking)	https://aider.chat/docs/leaderboards/
SWE-bench Verified	80.9	SWE-bench Verified	https://benchlm.ai/benchmarks/sweVerified