LOADING DATASHEET
GROUNDED IN REAL HUMAN CONVERSATIONSYOUR BENCH
Claude Sonnet 4.5
by Anthropic
CLOSEDHOSTEDCODING HELPWRITING HELPRESEARCH ASSISTANTEVERYDAY TASKS
RANKED #49 OF 316 ASSISTANTS · OVERALL #67 OF 493 RANKED · VIBE SCORE 6.3 · 5,911 VOICES ·
COPY BADGE pastes a README snippet with the rank SVG.
A versatile AI model built to help with writing, research, and coding tasks.
HAPPY8.3
208 mentions
SAD6.7
217 mentions
VIBE TRAJECTORY
26 weeks · 629 voices in this window
HONEYMOON FADING
Early praise is cooling off in recent weeks.
HOW TO USE IT
Closed model. Anthropic hosts it, so you use it through an app or an API.
PREFER OPEN SOURCE? THE CROWD HAS PICKS
Claude Sonnet 4.5 is closed, so you rent it. These open-weight models can genuinely stand in for it. Download once, own forever.
- OPEN WEIGHTS5.9
GLM 5.2 504BZhipuPick for top tier open weight agentic coding and complex project engineering tasks.💻 STRONG AT CODE🏆 NEAR-PEER QUALITY💸 COST EFFICIENT2.2k VOICESMATCH★★★ - OPEN WEIGHTS6.8
DeepSeek ReasonerDeepSeekPick for deep logical reasoning, complex math, and code solving at a lower cost.💻 STRONG AT CODE💸 COST EFFICIENT🏆 NEAR-PEER QUALITY4.2k VOICESMATCH★★★ - OPEN WEIGHTS7.3Apertus v1.5 70BInfomaniakPick for running a reliable open 70B multilingual assistant locally with privacy.🪶 RUNS ON LESS🔒 PRIVATE & OFFLINE💸 COST EFFICIENT2.5k VOICESMATCH★★★
WHAT THE INTERNET SAYS
Users love Claude Sonnet 4.5 for its strong coding assistance and polished writing, finding it well worth the price. However, many report issues with usage limits, occasional hallucinations, and losing track of context in long conversations.
4845 POSTS · 1066 COMMENTS · REDDIT · GITHUB · DEV.TO · BLUESKY · HACKER NEWS · LEMMY · BLOG · X · STACK OVERFLOW · DEV FORUMS
PEOPLE LOVE
- Popular for coding help (46 mentions)
- People feel it is worth the money (26 mentions)
- Good at writing and wording things (7 mentions)
PEOPLE COMPLAIN ABOUT
- Outages, errors, or limits get in the way (30 mentions)
- Sometimes makes things up (28 mentions)
- Refuses or lectures more than people like (19 mentions)
- Loses the thread in long chats (5 mentions)
TOPIC BY TOPIC
- Help with codeMOSTLY POSITIVE
46 thumbs up · 20 thumbs down
- PriceMOSTLY POSITIVE
26 thumbs up · 21 thumbs down
- Getting facts rightA SORE SPOT
11 thumbs up · 28 thumbs down
- Working when you need itA SORE SPOT
4 thumbs up · 30 thumbs down
- Saying no too muchA SORE SPOT
2 thumbs up · 19 thumbs down
- WritingPEOPLE LOVE THIS
7 thumbs up · 2 thumbs down
- SpeedMIXED FEELINGS
3 thumbs up · 4 thumbs down
- Long conversationsA SORE SPOT
2 thumbs up · 5 thumbs down
IN THEIR OWN WORDS
- FROM REDDIT >
“🚀 Plano (A3B) - the fastest and cheapest agent orchestration LLM that beats GPT 5.1 and Claude Sonnet 4.5.”
- FROM REDDIT >
“Just bought Windsurf after unlimited trial credits - massively disappointed with Claude Sonnet 4.5 - Is cursor better?.”
LOOKING FOR AN ALTERNATIVE?
Checked picks first: tags say why you would switch, stars say how fully each one stands in for Claude Sonnet 4.5.
Muse Spark 1.3> SOURCES (12)
- REDDIT · 2026-03-01 · 1705 UPVOTESAnthropic's Custom Claude Model For The Pentagon Is 1-2 Generations Ahead Of The Consumer Model
Anthropic's Custom Claude Model For The Pentagon Is 1-2 Generations Ahead Of The Consumer Model
- REDDIT · 2026-02-10 · 1402 UPVOTESI got tired of ChatGPT forgetting everything, so I built it a "Save Game" feature. 1,000+ sessions later, it remembers my decisions from 2…
I got tired of ChatGPT forgetting everything, so I built it a "Save Game" feature. 1,000+ sessions later, it remembers my decisions from 2 months ago.
- REDDIT · 2025-12-30 · 1309 UPVOTES30 day update: I gave several AIs money to invest in the stock market
30 day update: I gave several AIs money to invest in the stock market
- REDDIT · 2025-09-29 · 1298 UPVOTESClaude 4.5 Sonnet is here
Claude 4.5 Sonnet is here
- REDDIT · 2026-01-11 · 1157 UPVOTESClaude struggles against its own guidance to be "balanced" when asked about Trump's second term.
Claude struggles against its own guidance to be "balanced" when asked about Trump's second term.
- REDDIT · 2026-02-04 · 901 UPVOTESAnthropic mocks OpenAI's ChatGPT ad plans and pledges ad-free Claude
Anthropic mocks OpenAI's ChatGPT ad plans and pledges ad-free Claude
- REDDIT · 2025-11-05 · 857 UPVOTESPerplexity is DELIBERATELY SCAMMING AND REROUTING users to other models
Perplexity is DELIBERATELY SCAMMING AND REROUTING users to other models
- REDDIT · 2026-01-21 · 677 UPVOTESFull-Length Music Video using LTX‑2 I2V + ZIT
Full-Length Music Video using LTX‑2 I2V + ZIT
- REDDIT · 2025-09-29 · 666 UPVOTESClaude sonnet 4.5 is officially released
Claude sonnet 4.5 is officially released
- REDDIT · 2025-10-29 · 621 UPVOTESGrieving family uses AI chatbot to cut hospital bill from $195,000 to $33,000 — family says Claude highlighted duplicative charges,…
Grieving family uses AI chatbot to cut hospital bill from $195,000 to $33,000 — family says Claude highlighted duplicative charges, improper coding, and other violations
- REDDIT · 2025-11-06 · 586 UPVOTES“We Don’t Want a Bailout, We Just Need $1.4 Trillion and Everything Will Be Fine”
“We Don’t Want a Bailout, We Just Need $1.4 Trillion and Everything Will Be Fine”
- REDDIT · 2026-04-02 · 495 UPVOTESSo, claude have emotions? What????
So, claude have emotions? What????