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Van Data Team

text model comparison

Gemini 4 Carbon vs GPT-6.1 Sol

Gemini 4 Carbon and GPT-6.1 Sol are both current text models, from Google and OpenAI. Both cost $2 per 1M input tokens. On Arena Text, Gemini 4 Carbon scores 1528 Elo and GPT-6.1 Sol 1481 Elo (Arena, measured October 28, 2026).

Higher Arena Text
Gemini 4 Carbon1528 Elo against 1481 Elo
Newer release
Gemini 4 CarbonOct 2026 against Sep 2026

Data verified November 5, 2026 · Dataset 2026-11-05

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Side by side

Gemini 4 Carbon and GPT-6.1 Sol, line by line

Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.

FactGemini 4 CarbonGPT-6.1 Sol
Price
Price per 1M input tokens$2$2
Price per 1M output tokens$10$10
Independent benchmarks
Arena Text1528 Elo (#1 of 52) (better)1481 Elo (#17 of 52)
Arena WebDev1768 Elo (#4 of 46) (better)1751 Elo (#5 of 46)
GPQA DiamondNot measured95.4% (#4 of 41)
FrontierMath Tiers 1-3 (v2)Not measured93.7% (#1 of 41)
SimpleQA VerifiedNot measured73.9% (#3 of 38)
Specs
ProviderGoogleOpenAI
Release dateOctober 28, 2026September 29, 2026
Accesslimited accessAPI only
Context windowNot reported1,050,000 tokens
Max outputNot reported128,000 tokens
Inputtext, imagetext, image
Outputtexttext

Scores:Arena · 2026-11-03Epoch AI · 2026-11-03

Open both in the interactive comparison

Charts

Against every current text model

Where Gemini 4 Carbon and GPT-6.1 Sol land among the current models of their task, on every independent benchmark, on price and on context.

Where each stands

On Arena Text, Gemini 4 Carbon ranks #1 and GPT-6.1 Sol #17 of 52 current models. Each bar is the share of current models it beats: on score, price and context.

Gemini 4 Carbon and GPT-6.1 Sol among the current text models, one row per benchmark, price and context window.

Independent benchmarks

Arena Text

Gemini 4 Carbon:#1of 52

1,528 Elo · ahead of 100%

GPT-6.1 Sol:#17of 52

1,481 Elo · ahead of 67%

Arena WebDev

Gemini 4 Carbon:#4of 46

1,768 Elo · ahead of 93%

GPT-6.1 Sol:#5of 46

1,751 Elo · ahead of 91%

GPQA Diamond

Gemini 4 Carbon: Not scored

GPT-6.1 Sol:#4of 41

95.4% · ahead of 90%

FrontierMath Tiers 1-3 (v2)

Gemini 4 Carbon: Not scored

GPT-6.1 Sol:#1of 41

93.7% · ahead of 98%

SimpleQA Verified

Gemini 4 Carbon: Not scored

GPT-6.1 Sol:#3of 38

73.9% · ahead of 95%

Price and context

Price per 1M input tokens

Gemini 4 Carbon:#30of 55

$2 · cheaper than 24%

GPT-6.1 Sol:#30of 55

$2 · cheaper than 24%

Price per 1M output tokens

Gemini 4 Carbon:#35of 55

$10 · cheaper than 26%

GPT-6.1 Sol:#35of 55

$10 · cheaper than 26%

Context window

Gemini 4 Carbon: Not listed

GPT-6.1 Sol:#1of 64

1.05M tokens · longer than 86%

Scores fromArena · 2026-11-03Epoch AI · 2026-11-03

Quality against price

Arena Text · measured October 28, 2026

Gemini 4 Carbon scores 1,528 at $4; GPT-6.1 Sol scores 1,481 at $4 (blended price per 1M tokens). The line joins the current models no other beats on both price and Arena Text score; hover any point to name it.

Quality against priceArena Text score against price for 44 text models, Gemini 4 Carbon and GPT-6.1 Sol marked.1,2501,3001,3501,4001,4501,5001,550$0.30$1$3$10MOST ATTRACTIVE QUADRANTMedian price $3Median 1,476Blended price per 1M tokens (3 input : 1 output), log scaleArena Text (Elo)Gemini 4 CarbonGPT-6.1 Sol
Quality against price: the data
Arena Text score against price for 44 text models, Gemini 4 Carbon and GPT-6.1 Sol marked.
ModelProviderBlended price per 1M tokensArena Text (Elo)
Gemini 4 CarbonGoogle$41,528
Gemini 4 ArgonGoogle$41,520
Claude Opus 5.5Anthropic$81,509
Muse WonderMeta$81,507
Claude Fable 5Anthropic$201,504
Claude Fable 5.1Anthropic$201,504
Gemini 3.8 FlashGoogle$1.501,496
Muse Spark 1.3Meta$21,495
Claude Opus 5Anthropic$101,492
Kimi K3Moonshot Kimi$61,488
GPT-5.6 SolOpenAI$81,485
Gemini 3.6 FlashGoogle$31,483
GPT-5.5OpenAI$111,482
Claude Opus 4.8Anthropic$101,482
Qwen3.8-MaxAlibaba Qwen$31,482
GPT-6.1 SolOpenAI$41,481
GLM-5.3Z.ai$2.151,481
MiMo-V2.6-ProXiaomi MiMo$0.541,480
Claude Sonnet 5.5Anthropic$41,477
GLM-5.3-FlashZ.ai$0.241,477
GPT-6 AstraOpenAI$201,476
DeepSeek-V4.1-FlashDeepSeek$0.521,476
GPT-5.4OpenAI$5.631,475
Gemini 3 Flash PreviewGoogle$1.131,473
Grok 4.20xAI$1.561,472
GPT-5.6 TerraOpenAI$4.501,467
Grok 4.5xAI$31,465
DeepSeek-V4-ProDeepSeek$1.981,465
Claude Sonnet 5Anthropic$41,462
GPT-6 SolOpenAI$41,458
Gemini 3.5 Flash-LiteGoogle$0.851,456
Grok 4.6xAI$31,455
GPT-5.6 LunaOpenAI$0.451,453
MiMo-V2.6-FlashXiaomi MiMo$0.181,448
Step 5 PreviewStepFun$1.431,448
Grok 4.3xAI$1.561,442
GPT-6 LunaOpenAI$0.201,441
Grok 4.7xAI$31,441
Mistral Large 4Mistral AI$1.051,432
Claude Haiku 5.5Anthropic$0.201,425
GPT-4.1OpenAI$3.501,415
Solar Pro 4Upstage$0.521,388
GPT-4.1 miniOpenAI$0.701,383
GPT-4.1 nanoOpenAI$0.181,322

Cost

What each costs

Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.

The same work, priced

At each provider's listed rates.

What Gemini 4 Carbon and GPT-6.1 Sol cost for the same work, at the rates each provider lists.

  • 10M input and 2M output tokens

    The same price

    Gemini 4 Carbon
    $40
    GPT-6.1 Sol
    $40

  • The same, with 9M of the input tokens cached

    The same price

    Gemini 4 Carbon
    $22.90
    GPT-6.1 Sol
    $22.90
Workload or rateGemini 4 CarbonGPT-6.1 Sol
Example workloads
10M input and 2M output tokens$40$40
The same, with 9M of the input tokens cached$22.90$22.90
Other listed rates
1M input tokens, cached$0.10$0.10
1M input tokens, prompts over 272K tokensNot listed$4
1M output tokens, prompts over 272K tokensNot listed$15

Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.

Launch price $100, regular price $150

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Verdict

When to choose each

Gemini 4 Carbon

Where it leads

  • Higher Arena Text score, 1528 Elo vs 1481 Elo
  • Higher Arena WebDev score, 1768 Elo vs 1751 Elo

Best for

  • Finding, validating and patching vulnerabilities, for teams in Google's Fairwind Program
  • Long-horizon engineering over very long inputs, once access opens

Watch out for

  • Limited access: Google gives it first to a small group of cyber defenders, then to more trusted partners through its Fairwind Program, which governments, healthcare providers and telecoms apply to; there is no public API or app access yet
  • The $2 and $10 rates are introductory, with cached input 95% off; after an introductory period Google has not dated, $4 input and $20 output per 1M tokens apply
  • In Google's own table it trails GPT-6 Astra on FrontierSWE 2 (61.2% against 65.5%) and Claude Opus 5.5 on OSWorld-2.1 (81.5% against 87.2%)
  • Google publishes no context window or output limit for Carbon yet
Full Gemini 4 Carbon profile

GPT-6.1 Sol

Where it leads

No measured lead over Gemini 4 Carbon in this data.

Best for

  • Agent loops that replay a large cached prefix
  • A drop-in alternative to GPT-6 Sol at the same base cost

Watch out for

  • The same 272,000-token long-context cliff applies, rebilling the full request at $4 input and $15 output
  • Released a week after GPT-6 Sol at identical base pricing, so the two are easy to confuse on a rate card; the cached rate is the difference
Full GPT-6.1 Sol profile

From benchmark to production

Building on Gemini 4 Carbon or GPT-6.1 Sol?

Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.

AI Model Cost AuditLaunch price $100, regular price $150What the audit includes

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FAQ

Gemini 4 Carbon vs GPT-6.1 Sol FAQ

Which is cheaper, Gemini 4 Carbon or GPT-6.1 Sol?

Both cost $2 per 1M input tokens. For 10M input and 2M output tokens, Gemini 4 Carbon costs $40 and GPT-6.1 Sol $40 at standard rates.

Which is cheaper with prompt caching, Gemini 4 Carbon or GPT-6.1 Sol?

Gemini 4 Carbon charges $0.10 per 1M cached input tokens, 95% below its standard input rate, and GPT-6.1 Sol $0.10, 95% below. With 9M of 10M input tokens cached and 2M output tokens, Gemini 4 Carbon costs $22.90 and GPT-6.1 Sol $22.90.

Which scores higher on independent benchmarks, Gemini 4 Carbon or GPT-6.1 Sol?

Gemini 4 Carbon leads on Arena Text, 1528 Elo to 1481 Elo; Gemini 4 Carbon leads on Arena WebDev, 1768 Elo to 1751 Elo. Scores are independent evaluations, not either vendor's launch figures.

Further reading

More on Gemini 4 Carbon and GPT-6.1 Sol

Articles on Gemini 4 Carbon and GPT-6.1 Sol

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Production evaluation

Choosing between Gemini 4 Carbon and GPT-6.1 Sol?

Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.

  • A head-to-head evaluation on your real workload
  • Routing between models by cost and difficulty
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