Pairwise benchmark snapshot · Aug 16, 2026

Gemini 2.5 Pro vs Grok 4 benchmark

Name: Gemini 2.5 Pro vs Grok 4 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Gemini 2.5 Pro (Google) and Grok 4 (xAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Grok 4 is ahead by 138 points (1,488 vs 1,350; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Gemini 2.5 Pro resolves 63.8% versus 58.6% (seed-bootstrap (Aug 1, 2026)). Grok 4 streams faster (98 tok/s) while Gemini 2.5 Pro is the cheaper output token ($10/1M). Gemini 2.5 Pro has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Google

Gemini 2.5 Pro

Previous Google long-context flagship.

Elo 1,350$10/1M out

xAI

Grok 4

Previous xAI flagship.

Elo 1,488$15/1M out

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Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Gemini 2.5 Pro (5)vsGrok 4 (4)

Gemini 2.5 Pro: 5W (56%)Overall: Gemini 2.5 ProGrok 4: 4W (44%)

← Gemini 2.5 ProGrok 4 →

Grok 4 (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,350vs1,488

Coding Elo

—vs—

SWE-bench

63.8%vs58.6%

LiveBench

57.1%vs64.1%

GPQA Diamond

76.4%vs79%

Gemini 2.5 Pro: 1WGrok 4: 3W

Tied (1/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

95 tok/svs98 tok/s

Time to first token

210 msvs230 ms

Gemini 2.5 Pro: 1WGrok 4: 1W

Gemini 2.5 Pro (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$10/1Mvs$15/1M

Input price

$1.25/1Mvs$3/1M

Context window

1Mvs256k

Gemini 2.5 Pro: 3WGrok 4: 0W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGemini 2.5 Pro 4/6

Preference Elo

Grok 4

138 pts advantage

Throughput Speed

Grok 4

3 tok/s faster

Price Efficiency

Gemini 2.5 Pro

$5.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,350

EloHigh is better

1,488+10%

LiveBench

High is better

57.1%

LiveBenchHigh is better

64.1%+12%

SWE-bench

High is better

+9%63.8%

SWE-benchHigh is better

58.6%

GPQA

High is better

76.4%

GPQAHigh is better

79%+3%

TTFT

Low is better

+10%210 ms

TTFTLow is better

230 ms

Speed

High is better

95 tok/s

SpeedHigh is better

98 tok/s+3%

In $

Low is better

+140%$1.25/1M

In $Low is better

$3/1M

Out $

Low is better

+50%$10/1M

Out $Low is better

$15/1M

Context

High is better

+310%1M

ContextHigh is better

256k

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 41% with Gemini 2.5 Pro

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Gemini 2.5 Pro$193.75 / mo

In: $43.75Out: $150.00

Grok 4$330.00 / mo

In: $105.00Out: $225.00

Estimated Cost Delta

Gemini 2.5 Pro is estimated to save $136.25/month ($1,635/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Gemini 2.5 Pro:Pick Gemini 2.5 Pro when repo-level coding accuracy is the constraint.
2
Gemini 2.5 Pro:Pick Gemini 2.5 Pro when time-to-first-token matters more than peak Elo.
3
Gemini 2.5 Pro:Pick Gemini 2.5 Pro for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsGemini 2.5 Pro

Higher SWE-bench (63.8%).

High-volume chatGemini 2.5 Pro

Lower output list price ($10/1M).

Voice / low-latency UIGemini 2.5 Pro

Lower TTFT (210 ms).

Long-document RAGGemini 2.5 Pro

Larger window (1M).

Screenshots / visionGrok 4

Both accept images. Defaulting to the higher-Elo side (Grok 4).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Gemini 2.5 Pro	Higher SWE-bench (63.8%).
High-volume chat	Gemini 2.5 Pro	Lower output list price ($10/1M).
Voice / low-latency UI	Gemini 2.5 Pro	Lower TTFT (210 ms).
Long-document RAG	Gemini 2.5 Pro	Larger window (1M).
Screenshots / vision	Grok 4	Both accept images. Defaulting to the higher-Elo side (Grok 4).

Related Editorial Dispatches & Benchmark Notes

View all news

launchJul 10, 2025

Grok 4 remains the previous xAI flagship on this catalog

2025-07 row. 4.6 is the buy. We keep 4 so upgrade pairs and old inbound links resolve.

launchMar 25, 2025

Gemini 2.5 Pro remains the previous Google long-context flagship

2025-03 row. 3.x Pro replaced it. Kept for old “2.5 pro vs gpt-4o” inbound.

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LIVE

Google

Gemini 2.5 Pro

Elo 1,350

LiveBench57.1%

SWE-bench63.8%

Speed95 tok/s

Output cost$10/1M

xAI

Grok 4

Elo 1,488

LiveBench64.1%

SWE-bench58.6%

Speed98 tok/s

Output cost$15/1M

Frequently Asked Questions

Which is better overall, Gemini 2.5 Pro or Grok 4?: Grok 4 has the higher preference Elo in our latest snapshot (1,488). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Gemini 2.5 Pro or Grok 4?: Gemini 2.5 Pro leads SWE-bench at 63.8% vs 58.6%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Gemini 2.5 Pro output tokens are $10/1M versus $15/1M. Input prices and retry rates still move the real bill.
Which is faster, Gemini 2.5 Pro or Grok 4?: Gemini 2.5 Pro has the lower time-to-first-token (210 ms vs 230 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Gemini 2.5 Pro accepts 1M tokens versus 256k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Gemini 2.5 Pro and Grok 4 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Gemini 2.5 Pro matchups →|All Grok 4 matchups →

Gemini 2.5 Pro vs Gemini 1.5 Pro (previous gemini-pro)Gemini 2.5 Pro vs Gemini 3 Pro (next gemini-pro)Grok 4 vs Grok 3 (previous grok)Grok 4 vs Grok 4.6 (next grok)Gemini 2.0 Flash Thinking vs Grok 4 Gemini 3 Flash vs Grok 4

Gemini 2.5 Pro vs Grok 4 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Gemini 2.5 Pro (5)vsGrok 4 (4)

Gemini 2.5 Pro: 5W (56%)Overall: Gemini 2.5 ProGrok 4: 4W (44%)

← Gemini 2.5 ProGrok 4 →

Grok 4 (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,350vs1,488

Coding Elo

—vs—

SWE-bench

63.8%vs58.6%

LiveBench

57.1%vs64.1%

GPQA Diamond

76.4%vs79%

Gemini 2.5 Pro: 1WGrok 4: 3W

Tied (1/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

95 tok/svs98 tok/s

Time to first token

210 msvs230 ms

Gemini 2.5 Pro: 1WGrok 4: 1W

Gemini 2.5 Pro (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$10/1Mvs$15/1M

Input price

$1.25/1Mvs$3/1M

Context window

1Mvs256k

Gemini 2.5 Pro: 3WGrok 4: 0W

Recommended Workload Routing

Repo / coding agentsGemini 2.5 Pro

Higher SWE-bench (63.8%).

High-volume chatGemini 2.5 Pro

Lower output list price ($10/1M).

Voice / low-latency UIGemini 2.5 Pro

Lower TTFT (210 ms).

Long-document RAGGemini 2.5 Pro

Larger window (1M).

Screenshots / visionGrok 4

Both accept images. Defaulting to the higher-Elo side (Grok 4).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Gemini 2.5 Pro	Higher SWE-bench (63.8%).
High-volume chat	Gemini 2.5 Pro	Lower output list price ($10/1M).
Voice / low-latency UI	Gemini 2.5 Pro	Lower TTFT (210 ms).
Long-document RAG	Gemini 2.5 Pro	Larger window (1M).
Screenshots / vision	Grok 4	Both accept images. Defaulting to the higher-Elo side (Grok 4).

Frequently Asked Questions

Which is better overall, Gemini 2.5 Pro or Grok 4?

Grok 4 has the higher preference Elo in our latest snapshot (1,488). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Gemini 2.5 Pro or Grok 4?

Gemini 2.5 Pro leads SWE-bench at 63.8% vs 58.6%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Gemini 2.5 Pro output tokens are $10/1M versus $15/1M. Input prices and retry rates still move the real bill.

Which is faster, Gemini 2.5 Pro or Grok 4?

Gemini 2.5 Pro has the lower time-to-first-token (210 ms vs 230 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Gemini 2.5 Pro accepts 1M tokens versus 256k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Gemini 2.5 Pro and Grok 4 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Grok 4

Grok 4

Gemini 2.5 Pro

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok 4 remains the previous xAI flagship on this catalog

Gemini 2.5 Pro remains the previous Google long-context flagship

Cast Your Matchup Vote

Community Discussions (0)

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CompareLLM Matrix

Gemini 2.5 Pro

Grok 4

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Grok 4

Grok 4

Gemini 2.5 Pro

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok 4 remains the previous xAI flagship on this catalog

Gemini 2.5 Pro remains the previous Google long-context flagship

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Gemini 2.5 Pro

Grok 4

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons