Claude Opus 4.5
Claude Opus 4.5Alternatives?
CheaperGemini 4 Argonhighwins 62%-60%*$1.99Synchronous output stops at 65,536+2
BetterMuse Spark 1.2xhighwins 56%-80%$0.97Only auto tool_choice is supported+1
OpenKimi K3maxwins 55%-40%$2.00Sampling parameters are fixed+3CheaperMuse Wondermaxwins 60%-20%$4.52Only auto tool_choice is supported+5CheaperClaude Opus 5.5highwins 60%-20%$1.82No forced tool use+5Gemini 4 Argonhighwins 62%-60%*$1.99Synchronous output stops at 65,536+2Muse Wondermaxwins 60%-20%$4.52Only auto tool_choice is supported+5Claude Opus 5.5highwins 60%-20%$1.82No forced tool use+5Gemini 3.8 Flashhighwins 60%-85%*$1.24Sampling parameters are ignored+1Gemini 3.1 Pro Previewunstatedwins 57%-55%$2 / $12Cannot use both thinking controlsMuse Spark 1.2xhighwins 56%-80%$0.97Only auto tool_choice is supported+1
GPT-5.6 Solxhighwins 53%-20%$1.18Gemini 3.8 Flashhighwins 60%-85%*$1.24Sampling parameters are ignored+1
GLM 5.2maxOpenwins 53%-79%$1.47No image inputGPT-5.5highwins 54%+13%$1.54Prompts with >272K input tokensKimi K3maxOpenwins 55%-40%$2.00Sampling parameters are fixed+3
MiMo v2.6 ProunstatedOpenwins 55%-95%$0.43 / $0.87Pass back reasoning_content+3GLM 5.2maxOpenwins 53%-79%$1.47No image inputGLM 5.3 FlashunstatedOpenwins 52%-98%$0.15 / $0.50Defaults to max · Self-hosted+4GLM 5.3maxOpenwins 52%-79%$2.01No image input+4Claude Opus 5.5highwins 60%—$1.82No forced tool use+5Claude Fable 5.1maxwins 60%—$7.63Replace forced tool_choice+5Claude Opus 5maxwins 59%—$5.86Claude Fable 5highwins 58%—$10 / $50Claude Opus 4.6highwins 57%—$5 / $25Claude Opus 4.7highwins 57%—$5 / $25Claude Opus 4.8highwins 54%—$5 / $25Claude Sonnet 5highsame—$1.79All Anthropic models →History
9 versionsBenchmarks
in Chat & KnowledgeFAQ
How much does Claude Opus 4.5 cost?›
$5 per 1M input tokens and $25 per 1M output tokens; cached input $0.50 per 1M.
Is Claude Opus 4.5 free to use?›
There is no free API; the cheapest paid price is $5 per 1M input tokens.
How good is Claude Opus 4.5, and what is it best at?›
#153 of 334 in Chat & Knowledge, #6 of 19 in Coding, #7 of 16 in Agents & Tool Use, #12 of 195 in Writing & Language, #67 of 124 in Vision & Documents. Strongest at: Tool calling, Knowledge.
Is Claude Opus 4.5 better than Grok 4.5?›
On Arena Text · Russian, Claude Opus 4.5 scores 1,447.4 vs 1,449.1 — about the same.
How can I use Claude Opus 4.5?›
Through the API of Amazon Bedrock, Anthropic, Azure, Claude Platform on AWS, Google.
What is the context window of Claude Opus 4.5?›
200K tokens, with up to 64K output tokens.
When was Claude Opus 4.5 released? Is there a newer version?›
Released 2025-11-24. It has been superseded by Claude Opus 4.6.
Is Claude Opus 4.5 open source?›
No, Claude Opus 4.5 is a closed model available through an API. The closest open-weights option here is Kimi K3.
Can Claude Opus 4.5 read images?›
It accepts text and images, PDF files as input.
What is Claude Opus 4.5?›
Claude Opus 4.5 is a closed language model from Anthropic, released Nov 2025.
What are the best alternatives to Claude Opus 4.5?›
Gemini 4 Argon (cheaper), Muse Spark 1.2 (better), Kimi K3 (open weights).