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Comparison · 2 models · Updated Oct 4, 2026

Gemini 2.5 Pro vs Grok 4.3

Grok 4.3 comes out ahead, 67 to 63 on our weighted score, and it is the cheaper option too.

  1. Google

    Gemini 2.5 Pro

    Released Jun 17, 2025

    63/100
    • ECI145.3
    • Price$1.25 / $10.00
    • Context1.05M
    Full specs Remove Gemini 2.5 Pro
  2. Our pick

    xAI

    Grok 4.3

    Released Apr 17, 2026

    67/100
    • ECI149.2
    • Price$1.25 / $2.50
    • Context1M
    Full specs Remove Grok 4.3

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Grok 4.3 is our pick

Grok 4.3 is the better all-round choice, scoring 67/100 against Gemini 2.5 Pro (63). It leads on capability and price. Gemini 2.5 Pro wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityGrok 4.3Capabilities Index (ECI): Grok 4.3 149.2 · Gemini 2.5 Pro 145.3
  • Lowest priceGrok 4.3Grok 4.3 $1.56 · Gemini 2.5 Pro $3.44 per 1M tokens (3:1 blend)
  • Longest contextGemini 2.5 ProGemini 2.5 Pro 1,048,576 · Grok 4.3 1,000,000 tokens
  • Widest inputsGemini 2.5 ProGemini 2.5 Pro: Text, Images, PDFs, Audio, Video · Grok 4.3: Text, Images, PDFs
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightGemini 2.5 ProGrok 4.3
CapabilityCapabilities Index (ECI)50%7277
Price25%2441
Inputs & features15%10080
Context window10%6160
Overall100%63/10067/100
02 — Side by side

Every spec in one table

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

Gemini 2.5 Pro vs Grok 4.3 specifications side by side
SpecificationGemini 2.5 ProGoogleGrok 4.3xAI
Capability
Capabilities Index (ECI)145.3149.2 (best)
ECI rank#78 of 148#55 of 148 (best)
GPQA DiamondGraduate-level science questions85.3%88.8% (best)
FrontierMath Tiers 1–3Research-level mathematics24.6%42.8% (best)
OTIS Mock AIME 2024–2025Competition mathematics84.7%93.3% (best)
SWE-bench VerifiedFixing real GitHub issues57.6%—
SimpleQA VerifiedShort factual questions—33.2%
Price per million tokens
Input$1.25$1.25
Output$10.00$2.50 (best)
Cached input$0.125 (best)$0.20
Blended (3:1)$3.44$1.56 (best)
Long-context rateOver 200K: $2.50 / $15.00Over 200K: $2.50 / $5.00
Price sourceOfficial Google APIOfficial xAI API
Limits
Context window1,048,576 tokens (best)1,000,000 tokens
Max output65,536 tokens (best)30,000 tokens
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesYes
AudioYesNo
VideoYesNo
ReasoningYesYeslow · medium · high
Tool callingYesYes
Structured outputYesYes
Availability
WeightsProprietaryProprietary
API model IDgemini-2.5-progrok-4.3
API providers2227 (best)
ReleasedJun 17, 2025Apr 17, 2026
Knowledge cutoffJan 2025—
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.

  • Gemini 2.5 Pro$32.50
  • Grok 4.3$17.50
04 — Questions

Which should you choose?

Which is better: Gemini 2.5 Pro or Grok 4.3?

Grok 4.3 is the better all-round choice, scoring 67/100 against Gemini 2.5 Pro (63). It leads on capability and price. Gemini 2.5 Pro wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Gemini 2.5 Pro or Grok 4.3?

Grok 4.3 is cheaper at $1.25 input / $2.50 output per million tokens (official xAI API price). Gemini 2.5 Pro costs $1.25 input / $10.00 output per million tokens (official Google API price). At a typical mix of three input tokens to one output token, that is $1.56 per million tokens for Grok 4.3 versus $3.44 for Gemini 2.5 Pro (2.2× as much).

Which scores higher on benchmarks?

Grok 4.3 scores higher on the Capabilities Index (ECI): Grok 4.3 149.2 (#55 of 148) and Gemini 2.5 Pro 145.3 (#78 of 148). Their confidence ranges do not overlap (147.6–150.8 vs 143.6–146.9), so the gap is a real one. On individual benchmarks: GPQA Diamond — Grok 4.3 88.8%, Gemini 2.5 Pro 85.3%; FrontierMath Tiers 1–3 — Grok 4.3 42.8%, Gemini 2.5 Pro 24.6%; OTIS Mock AIME 2024–2025 — Grok 4.3 93.3%, Gemini 2.5 Pro 84.7%.

Which is better for coding?

There are no published SWE-bench Verified results for Grok 4.3 yet, so there is no like-for-like coding score. On overall capability, Grok 4.3 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?

Gemini 2.5 Pro has the largest context window at 1,048,576 tokens, against 1,000,000 for Grok 4.3. Maximum output per response: Gemini 2.5 Pro up to 65,536, Grok 4.3 up to 30,000 tokens.

Which can read images, PDFs, audio or video?

Gemini 2.5 Pro accepts text, images, PDFs, audio and video; Grok 4.3 accepts text, images and PDFs. Gemini 2.5 Pro handles the widest range of inputs.

Are any of these open source?

No. Gemini 2.5 Pro and Grok 4.3 are proprietary and only available through APIs and apps.

Which is newer?

Grok 4.3 is the newest, released Apr 17, 2026. Gemini 2.5 Pro came out Jun 17, 2025. Knowledge cutoff: Gemini 2.5 Pro Jan 2025.

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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