参考资料 6可信度 87%总体可信度: 87%该图钉的来源和参考资料对其日期的支持程度。包括来源在内的 6 份资料对图钉开始和结束时间支持程度的加权平均；资料每比最新的一份旧 180 天，权重减半显示所有可信度不低于 75% 的图钉

第一项始终是图钉的来源。总体可信度是各份资料对上方所用开始和结束时间支持程度的加权平均；资料每比最新的一份旧 180 天，权重减半。

• [1]90%
  x.ai/news/grok-4-5

  x.ai· 发布于 2026年10月12日· 开始 2026年7月8日· 占评分 21%

  SpaceXAI的API发布说明列出'July 8 - Grok 4.5 ... is now available on the xAI API';Cursor^[5]的公告日期为7月8日,TechCrunch^[4]在7月8日12:30 PM PDT报道了此次发布,Artificial Analysis^[6]也在当天发布了评测文章;公告页面自身的标题写着'Jul 16, 2026',没有其他来源支持这一日期。

• [2]92%
  Release Notes - SpaceXAI Docs

  docs.x.ai· 添加于 2026年10月12日· 开始 2026年7月8日 ✓· 占评分 21%

  The API release notes under July: 'July 8 - Grok 4.5 ... is now available on the xAI API', priced at $2 per 1 million input and $6 per 1 million output tokens with low, medium or high reasoning effort (default high), and 'July 17 - Grok 4.5 is now available in the API console for EU users'.^[1]

• [3]80%
  Grok 4.5 is so cheap compared to Fable 5 and GPT 5.5 that benchmark gaps may not matter much - The Decoder

  the-decoder.com· 发表于 2026年7月9日· 占评分 15%

  Price and efficiency comparison: $2 and $6 against $5 and $25 for Opus 4.8, $5 and $30 for GPT-5.5 and $10 and $50 for Fable 5; 1.9M tokens per Coding Agent task against 6.2M for GPT-5.5 and 7.2M for Fable 5; 80 tokens per second; not yet in the EU.^[1]

• [4]85%
  SpaceXAI releases Grok 4.5, which Elon describes as an 'Opus-class model' - TechCrunch

  techcrunch.com· 发表于 2026年7月8日· 占评分 14%

  Same-day report by Lucas Ropek: the first release since the company went public; Musk calls it 'an Opus-class model, but faster, more token-efficient and lower cost' and an internal assessment 'roughly comparable to Opus 4.7, but much faster'; $2 and $6 against $5 and $25 for Opus 4.7.^[1]

• [5]85%
  Grok 4.5 is now available! - Cursor Community Forum

  forum.cursor.com· 发表于 2026年7月8日· 占评分 14%

  Cursor's launch post of 8 July: Grok 4.5 was 'trained jointly with SpaceXAI on a new pretrained mixture-of-experts model, then continued on trillions of tokens of Cursor data', with a deliberately broader mix than Composer, high, medium and low effort levels, and EU availability 'in the coming weeks'.