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OpenAI

GPT-5.4 mini

VS
xAI

Grok 4.20

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GPT-5.4 mini is the premium intelligence choice, scoring 2.6% higher on coding benchmarks. However, Grok 4.20 compensates by delivering 1.2x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Grok 4.20 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GPT-5.4 mini fully justifies the cost.

Model Specs

GPT-5.4 mini

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+2.6%)
54.4%
Reasoning (gpqa-diamond)
87.5%

Cost & Performance

Cost (per 1M tokens)1.8x cheaper
$1.69Input: $0.75 | Output: $4.50
Speed
201 tps
Context Window
400k tokens
Model Specs

Grok 4.20

Benchmarks & Scores

Coding (swe-bench-pro)
51.8%
Reasoning (gpqa-diamond)Winner (+2.5%)
90%

Cost & Performance

Cost (per 1M tokens)
$3.00Input: $2.00 | Output: $6.00
Speed1.2x faster
233 tps
Context WindowLarger
1M tokens
Read our data collection methodology

Frequently Asked Questions

GPT-5.4 mini is cheaper than Grok 4.20. GPT-5.4 mini has a blended cost of $1.69/1M tokens, which is about 1.8x cheaper than Grok 4.20 at $3.00/1M tokens.

Grok 4.20 is faster than GPT-5.4 mini. Grok 4.20 generates 233 tokens per second (tps) compared to GPT-5.4 mini which generates 201 tokens per second.

GPT-5.4 mini is better for coding tasks. It scores 54.4% on coding evaluations (swe-bench-pro) compared to Grok 4.20 which scores 51.8%.

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