Released July 8, 2026 on the 1.5T-parameter V9 base. Pricing verified on docs.x.ai: $2/$6 under 200K prompt tokens, $4/$12 above. Full access initially gated to SuperGrok Heavy; staged rollout to SuperGrok $30 tier. EU availability lagged launch.
Top SWE Marathon score at 29% pass@1 — beats Claude Opus 4.8 (26%) and Fable 5 (24%) on long sessions
Exceptional token efficiency: ~16K output tokens per SWE-bench Pro task, ~4.2x fewer than Opus 4.8
$2/$6 per 1M — roughly 60–80% cheaper per solved task than Opus-class and GPT-5.6-class rivals
Weaknesses
Raw ceiling trails the frontier: 64.7% SWE-bench Pro vs Opus 4.8's 69.2%, with a higher reported hallucination rate
500K context is half the frontier norm, and rates double at ≥200K prompt tokens
Real-world use cases
What people actually use Grok 4.5 for.
Long-session software engineering — top SWE Marathon score (29% pass@1, ahead of Opus 4.8 and Fable 5)
Cost-controlled coding agents — ~4.2x fewer output tokens per solved SWE task than Opus 4.8
Live web/X-grounded coding and research with built-in search tools
How Grok 4.5 compares
The nearest models people weigh against it, and what actually separates them.
vs Grok 3 — Against Grok 3 (xAI), Grok 4.5 runs about 56% cheaper per token, takes 3.8x the context and answers faster. Take Grok 4.5 unless you specifically need what Grok 3 does better.
vs Grok 3 Beta — Against Grok 3 Beta (xAI), Grok 4.5 runs about 56% cheaper per token, takes 3.8x the context and answers faster. Take Grok 4.5 unless you specifically need what Grok 3 Beta does better.
vs Grok 3 Mini — Against Grok 3 Mini (xAI), Grok 4.5 costs about 90% more per token and takes 3.8x the context. Grok 3 Mini is the one to check first if the price difference matters more than the ceiling.
Price History
Grok 4.5 pricing over time
→0% since Aug 7
37 data points · tracked daily since Aug 7, 2026
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Start using Grok 4.5
Fast, token-efficient coding agents. Start free — no card required.
Grok 3 is xAI's flagship large language model, trained on a massive dataset including real-time X (Twitter) data and designed for advanced reasoning, coding, and research tasks. It competes directly with GPT-4o and Claude Sonnet 4 at a similar price point.
Verdict
A strong STEM-focused flagship with unique real-time X data access, but priced high for what it delivers versus Claude Sonnet 4 and GPT-4o.
Quality score
68%
Pricing
$3.00/1M in
$15.00/1M out
Speed
Balanced
3/5 speed
Context
131k tokens
Available via xAI API and integrated into X Premium subscriptions. Real-time X data access is a differentiating feature not available on competing models. Pricing is competitive but output costs are on the higher end for balanced-tier models.
FlagshipSTEMReal-time dataReasoningxAI
Best for
Users who need strong reasoning and coding capabilities with access to real-time X/Twitter data for current events and social context.
Grok 3 Beta is xAI's flagship large language model, trained on a massive dataset with claimed real-time access to X (Twitter) data and strong reasoning capabilities. It competes directly with frontier models like Claude Sonnet 4 and GPT-4o across coding, analysis, and general tasks.
Verdict
A powerful but unproven flagship that earns its place for STEM and real-time social data use cases, but the beta tag means it's not yet ready to dethrone Anthropic or OpenAI at this price.
Quality score
71%
Pricing
$3.00/1M in
$15.00/1M out
Speed
Balanced
3/5 speed
Context
131k tokens
Model is currently in beta, meaning capabilities and pricing may change. Real-time X data integration depends on xAI's API access policies, which may be subject to change. No image generation support confirmed.
FrontierSTEMReal-timexAIBeta
Best for
Users who want a frontier-capable model with real-time social context from X and strong STEM reasoning at a mid-range price point.
Grok 3 Mini is xAI's lightweight, budget-tier reasoning model built on the Grok 3 architecture, designed to deliver strong logical and analytical performance at a fraction of the cost of flagship models. It targets cost-sensitive workloads where reasoning quality still matters.
Verdict
A sharp budget reasoning model that earns its place when logic matters more than creativity or multimodal support.
Quality score
57%
Pricing
$0.30/1M in
$0.50/1M out
Speed
Fast
4/5 speed
Context
131k tokens
Pricing is highly competitive at $0.30 input / $0.50 output per million tokens. Context window is 131K tokens. No vision/image input support. xAI's API platform is newer and may have availability or rate-limit considerations compared to established providers.
BudgetReasoningLightweightLow CostxAI
Best for
Developers and researchers who need solid reasoning and logic tasks at near-throwaway pricing without committing to a full flagship model.
Grok 4.5 costs $2 per million input tokens and $6 per million output tokens on the API, with cached input at $0.3 per million. A month of 10M input and 2M output tokens runs about $32.00 at list price, before any batch or caching discounts.
What is the context window of Grok 4.5?
Grok 4.5 has a 500k tokens context window, with up to 500k tokens of output per response. That is the total of prompt plus response the model can hold in one request.
What is Grok 4.5 best for?
Grok 4.5 is best for fast, token-efficient coding agents. It is a strong fit when that workflow matters more than the tradeoffs around balanced pricing and fast speed.
When should I avoid Grok 4.5?
You need the highest solve rate per attempt or verified low hallucination — Claude Opus 5 is the safer premium pick.
What is a cheaper alternative to Grok 4.5?
Grok 3 Mini (xAI) at $0.30/1M/1M input against Grok 4.5's $2.00/1M/1M — roughly 90% less per token all in. A sharp budget reasoning model that earns its place when logic matters more than creativity or multimodal support. Compare it first if Grok 4.5's pricing is the thing stopping you.
What is a faster alternative to Grok 4.5?
Grok 3 — balanced against Grok 4.5's fast, with 131k tokens of context. Worth the swap when response time is what your users notice rather than the last few points of reasoning depth.
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