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xAI releases cost-effective Grok 4.5, challenging Fable 5 and GPT-5.5

By PulseAugur Editorial · [1 sources] ·

xAI has released Grok 4.5, a new model trained on thousands of Nvidia GB300 GPUs. While it lags behind Fable 5 and GPT-5.5 in coding benchmarks, Grok 4.5 is significantly more cost-effective, requiring 4.2 times fewer tokens than Opus 4.8 and priced at $2 per million input tokens. The model is expected to be available in the EU by mid-July. AI

IMPACT Sets a new benchmark for cost-effectiveness in LLMs, potentially shifting enterprise adoption priorities.

RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on The Decoder →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

xAI releases cost-effective Grok 4.5, challenging Fable 5 and GPT-5.5

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Signal score
0 / 100
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Significant
Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
Source corroboration
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Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, product
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High
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51 days old
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COVERAGE [1]

  1. The Decoder TIER_1 English(EN) · Matthias Bastian ·

    Grok 4.5 is so cheap compared to Fable 5 and GPT 5.5 that benchmark gaps may not matter much

    <p><img alt="" class="attachment-full size-full wp-post-image" height="768" src="https://the-decoder.com/wp-content/uploads/2026/06/xai_logo_wakk.png" style="height: auto; margin-bottom: 10px;" width="1376" /></p> <p> xAI releases Grok 4.5, trained on tens of thousands of Nvidia …

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