Grok 4.5latest from x-ai
It helps people write computer code, do knowledge work, and solve science and math problems.
x-ai’s newest large language model, able to hold about 500k tokens of context (roughly 375k words) in one conversation, working across text and image and file->text. You reach it through an API or through tools built on it. Built for coders, knowledge workers, and people working in STEM fields. x-ai describes it as: “Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.” source ↗
Our tested score
Battle record
2W – 2L
in our published battles
Forum sentiment (90d)
100%
developer-forum posts: 4 opinions in 151
What people are posting (90 days)
Loudest post this quarter
“Grok 4.5 is a bigger deal than Fable 5 - YouTube”
Battles fought
Compare Grok 4.5 against…
GPT-5.6 Luna · spreadsheets & ExcelGPT-5.6 Terra · spreadsheets & ExcelGPT-5.3-Codex · spreadsheets & ExcelGPT-5.6 Sol · spreadsheets & ExcelGPT-5.5 · spreadsheets & ExcelGLM 5.2 · spreadsheets & ExcelQwen3.7 Max · spreadsheets & ExcelClaude Opus 4.8 · spreadsheets & ExcelDeepSeek V4 Flash · spreadsheets & ExcelGPT-5.6 Sol · essay writingGPT-5.5 · essay writingGPT-5.6 Luna · essay writingGPT-5.6 Terra · essay writingGPT-5.3-Codex · essay writingClaude Sonnet 5 · essay writingClaude Opus 4.6 · essay writingQwen3.7 Max · essay writingGemini 3.1 Pro Preview · essay writingGemini 3.1 Flash Lite · extracting data from text
Every claim we hold (7)
- api price in per 1m2 USD/1M tokensOpenRouter API17 Aug 2026verified
- api price out per 1m6 USD/1M tokensOpenRouter API17 Aug 2026verified
- arena elo text1451 EloLMArena leaderboard (CC-BY-4.0)17 Aug 2026verified
- arena rank text38 rankLMArena leaderboard (CC-BY-4.0)17 Aug 2026verified
- arena votes text17738 votesLMArena leaderboard (CC-BY-4.0)17 Aug 2026verified
- context length500000 tokensOpenRouter API17 Aug 2026verified
- free routegrok.comx.ai11 Aug 2026verified