ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Grok 4.6 vs GPT-6.1 Sol

GPT-6.1 Sol comes out ahead, 69 to 61 on our weighted score, though Grok 4.6 is 25% cheaper per token.

  1. xAI

    Grok 4.6

    Released Aug 12, 2026

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

    OpenAI

    GPT-6.1 Sol

    Released Sep 29, 2026

    69/100
    • ECI—
    • Price$2.00 / $10.00
    • Context1.05M
    Full specs Remove GPT-6.1 Sol

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

GPT-6.1 Sol is our pick

GPT-6.1 Sol is the better all-round choice, scoring 69/100 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-6.1 Sol has no Capabilities Index score yet.

  • CapabilityGPT-6.1 SolShared benchmarks: GPT-6.1 Sol 90.7% · Grok 4.6 77.1%
  • Lowest priceGrok 4.6Grok 4.6 $3.00 · GPT-6.1 Sol $4.00 per 1M tokens (3:1 blend)
  • Longest contextGPT-6.1 SolGPT-6.1 Sol 1,050,000 · Grok 4.6 500,000 tokens
  • Widest inputsGPT-6.1 SolGrok 4.6: Text, Images · GPT-6.1 Sol: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGrok 4.6GPT-6.1 Sol
CapabilityShared benchmarks50%7791
Price25%2721
Inputs & features15%7080
Context window10%4861
Overall100%61/10069/100
02 — Side by side

Every spec in one table

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

Grok 4.6 vs GPT-6.1 Sol specifications side by side
SpecificationGrok 4.6xAIGPT-6.1 SolOpenAI
Capability
Capabilities Index (ECI)156.6—
ECI rank#19 of 148—
GPQA DiamondGraduate-level science questions94.0%95.4% (best)
FrontierMath Tiers 1–3Research-level mathematics66.0%93.7% (best)
OTIS Mock AIME 2024–2025Competition mathematics99.2%100% (best)
SimpleQA VerifiedShort factual questions49.3%73.9% (best)
Price per million tokens
Input$2.00$2.00
Output$6.00 (best)$10.00
Cached input$0.50$0.10 (best)
Blended (3:1)$3.00 (best)$4.00
Long-context rateOver 200K: $4.00 / $12.00Over 272K: $4.00 / $15.00
Price sourceOfficial xAI APIOfficial OpenAI API
Limits
Context window500,000 tokens1,050,000 tokens (best)
Max output500,000 tokens (best)128,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsNoYes
AudioNoNo
VideoNoNo
ReasoningYeslow · medium · high · xhighYeslow · medium · high · xhigh · max
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgrok-4.6gpt-6.1-sol
API providers29 (best)21
ReleasedAug 12, 2026Sep 29, 2026
Knowledge cutoffFeb 1, 2026Apr 30, 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.

  • Grok 4.6$32.00
  • GPT-6.1 Sol$40.00
04 — Questions

Which should you choose?

Which is better: Grok 4.6 or GPT-6.1 Sol?

GPT-6.1 Sol is the better all-round choice, scoring 69/100 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-6.1 Sol has no Capabilities Index score yet.

Which is cheaper, Grok 4.6 or GPT-6.1 Sol?

Grok 4.6 is cheaper at $2.00 input / $6.00 output per million tokens (official xAI API price). GPT-6.1 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-6.1 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-6.1 Sol 90.7% and Grok 4.6 77.1%. On individual benchmarks: GPQA Diamond — GPT-6.1 Sol 95.4%, Grok 4.6 94.0%; FrontierMath Tiers 1–3 — GPT-6.1 Sol 93.7%, Grok 4.6 66.0%; OTIS Mock AIME 2024–2025 — GPT-6.1 Sol 100%, Grok 4.6 99.2%; SimpleQA Verified — GPT-6.1 Sol 73.9%, Grok 4.6 49.3%.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4.6 and GPT-6.1 Sol yet, so there is no like-for-like coding score. On overall capability, GPT-6.1 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-6.1 Sol has the largest context window at 1,050,000 tokens, against 500,000 for Grok 4.6. Maximum output per response: Grok 4.6 up to 500,000, GPT-6.1 Sol up to 128,000 tokens.

Which can read images, PDFs, audio or video?

Grok 4.6 accepts text and images; GPT-6.1 Sol accepts text, images and PDFs. GPT-6.1 Sol handles the widest range of inputs.

Are any of these open source?

No. Grok 4.6 and GPT-6.1 Sol are proprietary and only available through APIs and apps.

Which is newer?

GPT-6.1 Sol is the newest, released Sep 29, 2026. Grok 4.6 came out Aug 12, 2026. Knowledge cutoff: Grok 4.6 Feb 1, 2026, GPT-6.1 Sol Apr 30, 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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