Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

OpenAI: GPT-5.1-Codex-Max vs Grok 4.6 benchmark

Name: OpenAI: GPT-5.1-Codex-Max vs Grok 4.6 AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares OpenAI: GPT-5.1-Codex-Max (OpenAI) and Grok 4.6 (xAI) using the latest snapshots we have as of Aug 17, 2026. Grok 4.6 wins on output price at $6/1M. Grok 4.6 has the larger context window (500k 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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OpenAI

OpenAI: GPT-5.1-Codex-Max

Auto-discovered from OpenRouter (openai/gpt-5.1-codex-max). Preview until a second source matches.

$10/1M out

xAI

Grok 4.6

xAI Aug 12 2026 post-training refresh of Grok 4.5. Same $2/$6 API price, 500k context, stronger agentic traces.

Elo 1,592$6/1M out

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Model A

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.

OpenAI: GPT-5.1-Codex-Max (1)vsGrok 4.6 (9)

OpenAI: GPT-5.1-Codex-Max: 1W (10%)Overall: Grok 4.6Grok 4.6: 9W (90%)

← OpenAI: GPT-5.1-Codex-MaxGrok 4.6 →

Grok 4.6 (5/5)

Intelligence & Reasoning

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

Preference Elo

—vs1,592

Coding Elo

—vs1,568

SWE-bench

—vs69.1%

LiveBench

—vs71.4%

GPQA Diamond

—vs84.6%

OpenAI: GPT-5.1-Codex-Max: 0WGrok 4.6: 5W

Grok 4.6 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs118 tok/s

Time to first token

—vs195 ms

OpenAI: GPT-5.1-Codex-Max: 0WGrok 4.6: 2W

Grok 4.6 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$10/1Mvs$6/1M

Input price

$1.25/1Mvs$2/1M

Context window

400kvs500k

OpenAI: GPT-5.1-Codex-Max: 1WGrok 4.6: 2W

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 AdvantageGrok 4.6 6/6

Preference Elo

No shared data

Throughput Speed

No shared data

Price Efficiency

Grok 4.6

$4.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

—

EloHigh is better

1,592

Code Elo

High is better

—

Code EloHigh is better

1,568

LiveBench

High is better

—

LiveBenchHigh is better

71.4%

SWE-bench

High is better

—

SWE-benchHigh is better

69.1%

GPQA

High is better

—

GPQAHigh is better

84.6%

TTFT

Low is better

—

TTFTLow is better

195 ms

Speed

High is better

—

SpeedHigh is better

118 tok/s

In $

Low is better

+60%$1.25/1M

In $Low is better

$2/1M

Out $

Low is better

$10/1M

Out $Low is better

$6/1M+67%

Context

High is better

400k

ContextHigh is better

500k+25%

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 17% with Grok 4.6

Monthly Volume50M tokens/mo

Quick Presets:

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

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

OpenAI: GPT-5.1-Codex-Max$193.75 / mo

In: $43.75Out: $150.00

Grok 4.6$160.00 / mo

In: $70.00Out: $90.00

Estimated Cost Delta

Grok 4.6 is estimated to save $33.75/month ($405/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Grok 4.6:Pick Grok 4.6 when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGrok 4.6

Lower output list price ($6/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGrok 4.6

Larger window (500k).

Screenshots / visionGrok 4.6

Grok 4.6 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Grok 4.6	Larger window (500k).
Screenshots / vision	Grok 4.6	Grok 4.6 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 12, 2026

Grok vs ChatGPT: price and Elo, not a personality contest

Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.

launchAug 12, 2026

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

xAI’s Aug 12 2026 refresh of Grok 4.5. 500k context. The Grok vs ChatGPT hub remaps here.

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.

Community Sentiment

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LIVE

OpenAI

OpenAI: GPT-5.1-Codex-Max

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$10/1M

xAI

Grok 4.6

Elo 1,592

LiveBench71.4%

SWE-bench69.1%

Speed118 tok/s

Output cost$6/1M

Frequently Asked Questions

Which is better overall, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: Grok 4.6 output tokens are $6/1M versus $10/1M. Input prices and retry rates still move the real bill.
Which is faster, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?: We do not have TTFT for both models.
Which has the larger context window?: Grok 4.6 accepts 500k tokens versus 400k.
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. OpenAI: GPT-5.1-Codex-Max and Grok 4.6 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All OpenAI: GPT-5.1-Codex-Max matchups →|All Grok 4.6 matchups →

Grok 4.6 vs Grok 4 (previous grok)GPT-5 vs Grok 4.6 GPT-4.5 Orion vs Grok 4.6 GPT-5.6 Sol vs Grok 4.6 GPT-5.6 Terra vs Grok 4.6 GPT-5 mini vs Grok 4.6

OpenAI: GPT-5.1-Codex-Max vs Grok 4.6 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

OpenAI: GPT-5.1-Codex-Max (1)vsGrok 4.6 (9)

OpenAI: GPT-5.1-Codex-Max: 1W (10%)Overall: Grok 4.6Grok 4.6: 9W (90%)

← OpenAI: GPT-5.1-Codex-MaxGrok 4.6 →

Grok 4.6 (5/5)

Intelligence & Reasoning

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

Preference Elo

—vs1,592

Coding Elo

—vs1,568

SWE-bench

—vs69.1%

LiveBench

—vs71.4%

GPQA Diamond

—vs84.6%

OpenAI: GPT-5.1-Codex-Max: 0WGrok 4.6: 5W

Grok 4.6 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

—vs118 tok/s

Time to first token

—vs195 ms

OpenAI: GPT-5.1-Codex-Max: 0WGrok 4.6: 2W

Grok 4.6 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$10/1Mvs$6/1M

Input price

$1.25/1Mvs$2/1M

Context window

400kvs500k

OpenAI: GPT-5.1-Codex-Max: 1WGrok 4.6: 2W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGrok 4.6

Lower output list price ($6/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGrok 4.6

Larger window (500k).

Screenshots / visionGrok 4.6

Grok 4.6 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	Grok 4.6	Larger window (500k).
Screenshots / vision	Grok 4.6	Grok 4.6 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

Grok 4.6 output tokens are $6/1M versus $10/1M. Input prices and retry rates still move the real bill.

Which is faster, OpenAI: GPT-5.1-Codex-Max or Grok 4.6?

We do not have TTFT for both models.

Which has the larger context window?

Grok 4.6 accepts 500k tokens versus 400k.

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. OpenAI: GPT-5.1-Codex-Max and Grok 4.6 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

No shared data

No shared data

Grok 4.6

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

Grok 4 remains the previous xAI flagship on this catalog

Cast Your Matchup Vote

Community Discussions (0)

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CompareLLM Matrix

OpenAI: GPT-5.1-Codex-Max

Grok 4.6

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

No shared data

No shared data

Grok 4.6

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Grok 4.6 (Aug 12): post-training refresh, same $2/$6 list

Grok 4 remains the previous xAI flagship on this catalog

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

OpenAI: GPT-5.1-Codex-Max

Grok 4.6

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons