Anthropic
anthropic.com › claude › sonnet
Claude Sonnet 4.5
Pricing for Sonnet 4.5 starts at $3 per million input tokens and $15 per million output tokens, with up to 90% cost savings with prompt caching and 50% cost savings with batch processing. To learn more, check out our pricing page.
Reddit
reddit.com › r/cline › claude sonnet 4.5 is now available in cline
r/CLine on Reddit: Claude Sonnet 4.5 is now available in Cline
September 29, 2025 -
Hey everyone! Claude Sonnet 4.5 just went live in Cline.
Same pricing as Sonnet 4 ($3/$15), 200k or 1M context window, but the behavior is noticeably different. The model is way more terse -- it skips the narration and just executes. Where Sonnet 4 would explain every step, 4.5 chains operations together and only speaks up when it needs clarification.
The big improvement is how it handles long tasks. It naturally maintains state files (progress.txt, implementation notes, test manifests) and picks up exactly where it left off across sessions.
This pairs well with Cline's Auto Compact and Focus Chain features. When context gets compressed, the model's state files provide additional continuity.
Model string: claude-sonnet-4-5-20250929
Full details: https://cline.bot/blog/claude-sonnet-4-5
Curious what the community thinks of the latest iteration of Claude Sonnet!
-Nick
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I saw support was added to Bedrock and then the commit was reverted, then a fix was made that excluded Bedrock. Is there a blocker to support 4.5 in Bedrock?
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Very good post. I clearly noticed how it wastes less tokens. Same token price, less cost overall. Very good model. Hope they don't degrade it and rug pull.
Sonnet 4.5 is good but the price.....
thats why I only use GPT 5. actually, GPT 5 one-shots a lot of things Sonnet needs like 40 tries. More on reddit.com
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August 28, 2025I knew that sonnet 4.5 was relatively expensive, not THIS expansive.
My opinion that I just came up with; Is there a use case for sonnet 4.5? Yeah, if you’re a vibe coder. If you’re using ai very sporadically to think for you when you ran out of steam or for whatever reason, you’re fine with waiting for GPT 5 even though it’s slow as heck. If you’re using ai as a tool to just write for you, groks fast models do the job instantly if your prompts are precise and don’t need extra logic just text output. And if you’re a vibe coder you’d wait a century for gpt 5 codex high to output file after file for you, while fast models like Gemini 2.5 flash or grok fast can’t handle the amount of logic and context that need to be handled for you. So you go with sonnet. More on reddit.com
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October 21, 2025Sonnet 4.5 is available now!
I’m giving it a chance, so far pleasantly surprised. Thank you anthropic - if it continues being good I might restart my sub More on reddit.com
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September 29, 2025Claude Sonnet 4.5 is now available in Cline
I saw support was added to Bedrock and then the commit was reverted, then a fix was made that excluded Bedrock. Is there a blocker to support 4.5 in Bedrock? More on reddit.com
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September 29, 2025How much does Claude Sonnet 4.5 cost?
For prompts ≤200K tokens: $3/M input, $15/M output. For prompts >200K tokens: $6/M input, $22.5/M output. Prompt caching offers additional savings (write: $3.75-7.50/M, read: $0.30-0.60/M). Same pricing as Sonnet 4.
leanware.co
leanware.co › insights › claude-sonnet-4-5-overview
Claude Sonnet 4.5: Features, Benchmarks & Pricing Guide (2025)
What is Claude Sonnet 4.5 used for?
Claude Sonnet 4.5 handles software development, agent workflows, and computer-use tasks. It's used for pull request generation, bug fixing, multi-step feature building, browser automation, security audits, financial analysis, legal document review, and research with long context. It integrates with tools like Cursor and GitHub Copilot.
leanware.co
leanware.co › insights › claude-sonnet-4-5-overview
Claude Sonnet 4.5: Features, Benchmarks & Pricing Guide (2025)
Where can I access Claude Sonnet 4.5?
Claude API (claude-sonnet-4-5), Claude.ai web interface, iOS/Android apps, Amazon Bedrock, Google Cloud Vertex AI, VS Code extension, and integrated in Cursor, Windsurf, and GitHub Copilot. Free tier available on Claude.ai.
leanware.co
leanware.co › insights › claude-sonnet-4-5-overview
Claude Sonnet 4.5: Features, Benchmarks & Pricing Guide (2025)
Videos
16:16
How I Got GPT-5 & Claude 4.5 Access for $0 — 40M Tokens + $200 ...
33:17
Sonnet 4.5 is the best coding model in the world - YouTube
10:28
Claude Sonnet 4.5 (In-depth look): BEST AI CODER IN THE WORLD?! ...
r/ClaudeAI on Reddit: Introducing Claude Haiku 4.5: our latest ...
11:01
New Claude Sonnet 4.5 Just Broke EVERY Limit We Knew (So Powerful ...
13:00
Claude Haiku 4.5 Is HALF the Cost of Sonnet 4 – But Can It Still ...
Anthropic
anthropic.com › news › claude-sonnet-4-5
Introducing Claude Sonnet 4.5
Higher tool success at lower cost is a major leap for agentic coding. Claude Sonnet 4.5 balances creativity and control perfectly. Claude Sonnet 4.5 delivers impressive gains on our most complex, long-context tasks—from engineering in our codebase to in-product features and research.
Cursor IDE
cursor-ide.com › blog › claude-sonnet-4-5-pricing
Claude Sonnet 4.5 Pricing Guide 2025: Complete Cost Analysis, Comparison & Calculator - Cursor IDE 博客
October 4, 2025 - Claude Sonnet 4.5 pricing starts at $3 per million input tokens and $15 per million output tokens, representing a cost-neutral upgrade from Claude Sonnet 4 while delivering significantly enhanced capabilities.
Leanware
leanware.co › insights › claude-sonnet-4-5-overview
Claude Sonnet 4.5: Features, Benchmarks & Pricing Guide (2025)
We enjoy working with Leanware’s team.
TLDR: Claude Sonnet 4.5 scores 77.2% on SWE-bench Verified (82.0% with parallel compute), 50.0% on Terminal-Bench, and 61.4% on OSWorld. It reaches 100% on AIME with Python and 83.4% on GPQA Diamond. Pricing is $3 per million input tokens and $15 per million output tokens; you can use it on ... Leanware has a good working process and iterates on the product quickly, adapting to the client’s methodologies. The team is accommodating with the timeline and communicates effectively through thrice-weekly phone calls, Slack, and reports. Their flexibility has made them an excellent partner. Comprehen
Claude
claude.com › pricing
Pricing | Claude
Explore Claude pricing plans and API costs. Choose from Free, Pro, Max, Team, or Enterprise options to get started with Claude.
Medium
medium.com › data-science-in-your-pocket › claude-4-5-sonnet-bye-bye-software-devs-7c35c244e357
Claude 4.5 Sonnet : Bye bye Software Devs | by Mehul Gupta | Data Science in Your Pocket | Medium
September 30, 2025 - Sonnet 4.5 sustains focus across 30+ hour multi-step tasks.
Claude
docs.claude.com › en › docs › about-claude › pricing
Pricing - Claude Docs
October 16, 2025 - Cache read tokens are 0.1 times the base input tokens price · Claude models are available on AWS Bedrock, Google Vertex AI, and Microsoft Foundry. For official pricing, visit: ... Regional endpoint pricing for Claude 4.5 models and beyondStarting with Claude Sonnet 4.5 and Haiku 4.5, AWS Bedrock and Google Vertex AI offer two endpoint types:
TechCrunch
techcrunch.com › home › anthropic launches claude sonnet 4.5, its best ai model for coding
Anthropic launches Claude Sonnet 4.5, its best AI model for coding | TechCrunch
September 29, 2025 - The tense competition in the AI world has made it common for companies to ship flagship models every few months. Claude Sonnet 4.5 is launching less than two months after Anthropic’s last AI model, Claude Opus 4.1.
IntuitionLabs
intuitionlabs.ai › home › articles › claude pricing explained: subscription plans & api costs
Claude Pricing Explained: Subscription Plans & API Costs | IntuitionLabs
2 days ago - Claude Opus 4.5 (most capable): ... (≤200K input tokens), $3.00 input / $15.00 output; for “long-context” requests (any request with >200K input tokens), $6.00 input / $22.50 output ([7])....
OpenRouter
openrouter.ai › anthropic › claude-sonnet-4.5
Claude Sonnet 4.5 - API, Providers, Stats | OpenRouter
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 improvements across system design, code security, and specification adherence.
Medium
medium.com › @cognidownunder › claude-sonnet-4-5-4ddf33d53cd4
Claude Sonnet 4.5 Extended Thinking Explained: Can Code for 30 Hours Straight, But That’s Not the Scary Part | by Cogni Down Under | Medium
September 30, 2025 - The Artificial Analysis Intelligence Index ranks it fourth globally at 61 points in reasoning mode, ahead of Gemini 2.5 Pro and Grok 4 Fast, though behind GPT-5 high’s 68 points. At $3 per million input tokens and $15 per million output tokens, ...
LLM Stats
llm-stats.com › home › models › claude sonnet 4.5
Claude Sonnet 4.5: Pricing, Context Window, Benchmarks, and More
September 29, 2025 - A comprehensive look at Claude Sonnet 4.5 - pricing, context window, API details, benchmarks, safety improvements, and what it means for developers and enterprises. Could this be the best AI for coding?
Apidog
apidog.com › blog › claude-sonnet-4-5-pricing
How Much Does Claude Sonnet 4.5 Cost?
September 30, 2025 - Explore Claude Sonnet 4.5 pricing in detail, from API rates at $3 per million input tokens to consumer plans. This Anthropic model leads in coding and reasoning benchmarks, offering value for developers.
CometAPI
cometapi.com › how-much-does-claude-sonnet-4-5-cost
How Much Does Claude Sonnet 4.5 Cost? - CometAPI - All AI Models in One API
October 15, 2025 - OpenAI GPT-4o (examples reported): approx 2.50 / 1M input**, **10 / 1M output. OpenAI GPT-5 (example public pricing for its flagship): approx 1.25 / 1M input**, **10 / 1M output (OpenAI’s published API pricing when GPT-5 launched).
Simon Willison
simonwillison.net › 2025 › Sep › 29 › claude-sonnet-4-5
Claude Sonnet 4.5 is probably the “best coding model in the world” (at least for now)
September 29, 2025 - Anthropic gave me access to a preview version of a “new model” over the weekend which turned out to be Sonnet 4.5. My initial impressions were that it felt like a better model for code than GPT-5-Codex, which has been my preferred coding model since it launched a few weeks ago.
Reddit
reddit.com › r/cursor › sonnet 4.5 is good but the price.....
r/cursor on Reddit: Sonnet 4.5 is good but the price.....
August 28, 2025 -
With grok-code-fast, I feel like Im in unlimited mode... I know it’s free nos, but even if it weren’t, just look at this!
With Sonnet, you can easily burn through all your credits in just a few hours.
There’s no debate that Sonnet 4.5 is better, but the question is: is the price worth it?
For me, 90% of problems are solved with Grok in just 2 or 3 interactions.
Claude Docs
platform.claude.com › docs › en › about-claude › pricing
Pricing - Claude Docs
When using Claude Sonnet 4 or Sonnet 4.5 with the 1M token context window enabled, requests that exceed 200K input tokens are automatically charged at premium long context rates:
Cline
cline.bot › blog › claude-sonnet-4-5
Anthropic's Claude Sonnet 4.5 is Live in Cline - Cline Blog
Claude Sonnet 4.5 by Anthropic is now available in Cline.