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Comparison · 2 models · Updated Oct 4, 2026

GPT-6 Sol vs Grok 4.6

GPT-6 Sol comes out ahead, 67 to 61 on our weighted score, though Grok 4.6 is 25% cheaper per token.

  1. Our pick

    OpenAI

    GPT-6 Sol

    Released Sep 22, 2026

    67/100
    • ECI—
    • Price$2.00 / $10.00
    • Context1.05M
    Full specs Remove GPT-6 Sol

  2. xAI

    Grok 4.6

    Released Aug 12, 2026

    61/100
    • ECI156.6
    • Price$2.00 / $6.00
    • Context500K
    Full specs Remove Grok 4.6

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

GPT-6 Sol is our pick

GPT-6 Sol is the better all-round choice, scoring 67/100 against Grok 4.6 (61). It leads on capability, inputs & features and context window. Grok 4.6 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%. Capability uses the average of shared benchmarks (GPQA Diamond, FrontierMath Tiers 1–3, OTIS Mock AIME 2024–2025 and SimpleQA Verified), because GPT-6 Sol has no Capabilities Index score yet.

  • CapabilityGPT-6 SolShared benchmarks: GPT-6 Sol 86.2% · Grok 4.6 77.1%
  • Lowest priceGrok 4.6Grok 4.6 $3.00 · GPT-6 Sol $4.00 per 1M tokens (3:1 blend)
  • Longest contextGPT-6 SolGPT-6 Sol 1,050,000 · Grok 4.6 500,000 tokens
  • Widest inputsGPT-6 SolGPT-6 Sol: Text, Images, PDFs · Grok 4.6: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGPT-6 SolGrok 4.6
CapabilityShared benchmarks50%8677
Price25%2127
Inputs & features15%8070
Context window10%6148
Overall100%67/10061/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

GPT-6 Sol vs Grok 4.6 specifications side by side
SpecificationGPT-6 SolOpenAIGrok 4.6xAI
Capability
Capabilities Index (ECI)—156.6
ECI rank—#19 of 148
GPQA DiamondGraduate-level science questions94.3% (best)94.0%
FrontierMath Tiers 1–3Research-level mathematics89.8% (best)66.0%
OTIS Mock AIME 2024–2025Competition mathematics100% (best)99.2%
SimpleQA VerifiedShort factual questions60.7% (best)49.3%
Price per million tokens
Input$2.00$2.00
Output$10.00$6.00 (best)
Cached input$0.20 (best)$0.50
Blended (3:1)$4.00$3.00 (best)
Long-context rateOver 272K: $4.00 / $15.00Over 200K: $4.00 / $12.00
Price sourceOfficial OpenAI APIOfficial xAI API
Limits
Context window1,050,000 tokens (best)500,000 tokens
Max output128,000 tokens500,000 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoNo
ReasoningYeslow · medium · high · xhigh · maxYeslow · medium · high · xhigh
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgpt-6-solgrok-4.6
API providers2529 (best)
ReleasedSep 22, 2026Aug 12, 2026
Knowledge cutoffApr 20, 2026Feb 1, 2026
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • GPT-6 Sol$40.00
  • Grok 4.6$32.00
04 — Questions

Which should you choose?

Which is better: GPT-6 Sol or Grok 4.6?

GPT-6 Sol is the better all-round choice, scoring 67/100 against Grok 4.6 (61). It leads on capability, inputs & features and context window. Grok 4.6 wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%. Capability uses the average of shared benchmarks (GPQA Diamond, FrontierMath Tiers 1–3, OTIS Mock AIME 2024–2025 and SimpleQA Verified), because GPT-6 Sol has no Capabilities Index score yet.

Which is cheaper, GPT-6 Sol or Grok 4.6?

Grok 4.6 is cheaper at $2.00 input / $6.00 output per million tokens (official xAI API price). GPT-6 Sol costs $2.00 input / $10.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $3.00 per million tokens for Grok 4.6 versus $4.00 for GPT-6 Sol (1.3× as much).

Which scores higher on benchmarks?

Not every model here has a Capabilities Index score, so we compare the average of shared benchmarks (GPQA Diamond, FrontierMath Tiers 1–3, OTIS Mock AIME 2024–2025 and SimpleQA Verified): GPT-6 Sol 86.2% and Grok 4.6 77.1%. On individual benchmarks: GPQA Diamond — GPT-6 Sol 94.3%, Grok 4.6 94.0%; FrontierMath Tiers 1–3 — GPT-6 Sol 89.8%, Grok 4.6 66.0%; OTIS Mock AIME 2024–2025 — GPT-6 Sol 100%, Grok 4.6 99.2%; SimpleQA Verified — GPT-6 Sol 60.7%, Grok 4.6 49.3%.

Which is better for coding?

There are no published SWE-bench Verified results for GPT-6 Sol and Grok 4.6 yet, so there is no like-for-like coding score. On overall capability, GPT-6 Sol leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

GPT-6 Sol has the largest context window at 1,050,000 tokens, against 500,000 for Grok 4.6. Maximum output per response: GPT-6 Sol up to 128,000, Grok 4.6 up to 500,000 tokens.

Which can read images, PDFs, audio or video?

GPT-6 Sol accepts text, images and PDFs; Grok 4.6 accepts text and images. GPT-6 Sol handles the widest range of inputs.

Are any of these open source?

No. GPT-6 Sol and Grok 4.6 are proprietary and only available through APIs and apps.

Which is newer?

GPT-6 Sol is the newest, released Sep 22, 2026. Grok 4.6 came out Aug 12, 2026. Knowledge cutoff: GPT-6 Sol Apr 20, 2026, Grok 4.6 Feb 1, 2026.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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