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Grok 4.5

SpaceXAI · Released Jul 2026

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Competitively priced coding and agentic model at $2/$6 per 1M tokens up to 200K tokens of context, doubling to $4/$12 above that, with a 500K window. xAI's published benchmarks place it mid-pack behind Fable 5 and GPT-5.5, though it leads Opus 4.8 on DeepSWE and Terminal-Bench 2.1. The real story is cost efficiency: 4.2x more token-efficient than Opus 4.8 on SWE-Bench Pro. Best for teams needing strong coding at a fraction of frontier pricing; xAI's docs list only US regions.

Is it right for you?

Good for

  • Cost-sensitive coding workloads — $2/$6 pricing undercuts Opus by 60% on input, 76% on output
  • Token-efficient agentic tasks — resolves SWE Bench Pro with ~16K output tokens, 4.2x fewer than Opus 4.8
  • Long-running tool-use and multi-step engineering — trained alongside Cursor for agentic coding workflows
  • Office productivity — built-in Excel, PowerPoint, Word integration via Grok Build

Not good for

  • Prompts of 200K tokens or more budgeted off the headline rate: input and output double to $4 and $12 per 1M, and cached input rises from $0.30 to $0.60
  • Teams needing the absolute frontier — Fable 5 and GPT-5.5 lead on most coding benchmarks
  • EU-based projects — xAI's grok-4.5 docs list only the us-east-1 and us-west-2 regions
  • Workloads requiring independent benchmark verification — all current scores are vendor-reported

How it performs by task

Code generation

Very Good

Strong on SWE Bench Pro (64.7%) and Terminal Bench 2.1 (83.3%); mid-pack among frontier models

Agentic coding

Very Good

Built for long-running tool use with Cursor training data; 4.2x token efficiency advantage

Knowledge work

Good

Solid but trails Opus 4.8 and Fable 5 on knowledge benchmarks per vendor charts

Reasoning

Good

Configurable reasoning_effort (low/medium/high); adequate but not class-leading

Multimodal

Good

Text + image input, text output only; no image generation natively

Pricing

Input

$2 / 1M tokens

Output

$6 / 1M tokens

Context

500K ctx; 200K+ $4/$12; cache $0.30 (200K+ $0.60)

View full pricing

Benchmarks

BenchmarkScoreSource
DeepSWE 1.062.0% Source
DeepSWE 1.153% Source
SWE Marathon29.0% Source
Terminal Bench 2.183.3% Source
SWE Bench Pro64.7% Source

Verdict history

Sep 30, 2026
conditional -> conditional (summary corrected: 200K+ pricing tier added): Rating unchanged. The standing summary quoted only the headline $2/$6 rate. xAI's model page lists $4/$12 (cached $0.60) for prompts of 200K tokens or more, and lists only US regions.
Jul 15, 2026
copy edit to brevity standard: detail preserved in existing structured children

Sources

Verification log

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    Automated agent

  • Pricing· Updated

    Automated agent

    Headline $2/$6 unchanged. Stored pricing_context omitted the 200K+ tier: xAI lists $4/$12 (cached $0.60) for prompts of 200K tokens or more, and only US regions. pricing_context, pricing_url, strengths and sources refreshed; summary corrected via verdict_set (conditional held).

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    Imported at launch

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    Imported at launch

How we evaluate