Live survey286 models · 13 providers · 17,592 auditsAudited Using Git Worktrees · SAFE →What changedHow we verifyllms.txt

Model comparison · Updated 17 Aug 2026

Gemini 3.1 Pro Preview Custom Tools vs GPT-4.1

Gemini 3.1 Pro Preview Custom Tools and GPT-4.1 cost the same on input, $2.00 per 1M tokens. Gemini 3.1 Pro Preview Custom Tools has the larger context window (1.05M against 1.05M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,980 a month for Gemini 3.1 Pro Preview Custom Tools and $1,620 for GPT-4.1.

Ask an AI about this pageGChatGPTCClaudePPerplexityGeGeminiXGrok
More
CoCopilotAIGoogle AI Mode
Cite

Cite this page

ModelsAtlas. “Gemini 3.1 Pro Preview Custom Tools vs GPT-4.1”. Retrieved 17 Aug 2026. https://modelsatlas.com/compare/google/gemini-3-1-pro-preview-customtools/vs/openai/gpt-4-1

Model A

Gemini 3.1 Pro Preview Custom Tools

by Google · weights not marked open · GRIDE5

Input / 1M
$2.00
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$12.00
Context1.05M
vs

Model B

GPT-4.1

by OpenAI · weights not marked open · GRIDE5

Input / 1M
$2.00
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026
Output / 1M$8.00
Context1.05M

Key numbers

Standard tier · highlighted = better

Gemini 3.1 Pro Preview Custom Tools
GPT-4.1
Input / 1M tokens
$2.00
$2.00
Output / 1M tokens
$12.00
$8.00
Batch input / output
Not listed
$0.05 / $0.20
Context window
1,048,576
1,047,576
Input types
Not disclosed
Not disclosed
Weights
Not marked open
Not marked open
Tiers listed
standard
batch, standard
Prices checked
2026-08-17
2026-08-17

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out
$1,980/mo
$1,620/mo
RAG over documents2k queries/day · 12k in, 500 out
$1,800/mo
$1,680/mo
Coding agent300 tasks/day · 60k in, 8k out
$1,944/mo
$1,656/mo

Gemini 3.1 Pro Preview Custom Tools   GPT-4.1 · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. Gemini 3.1 Pro Preview Custom Tools and GPT-4.1 share E5.

Same square as Gemini 3.1 Pro Preview Custom Tools: Gemini 2.5 Pro Preview 06-05 ($1.25), Grok 4.3 ($1.25), Muse Spark 1.1 ($1.25). Open E5

AFreeB<$0.10C$0.10–0.30D$0.30–1E$1–3F$3–10G$10–30H$30+1<32K232–128K3128–256K4256K–1M51M6>1MINPUT PRICE PER 1M TOKENS →CONTEXT WINDOW ↑ · position within a square follows the real valueClaude Sonnet 5 · E5Claude Sonnet 5.5 · E5Gemini 3.1 Pro Preview · E5Qwen3.8 2.4T A95B · E5Gemini 3.5 Flash · E5Gemini 3.1 Pro Preview Custom ToolsGemini 3.1 Pro Preview Custom ToolsGPT-4.1GPT-4.1
Gemini 3.1 Pro Preview Custom ToolsGPT-4.1Nearest neighboursOpen weights
View the map as a table (1 squares)
SquarePrice bandContext bandModels
GRIDE5$1–31MGemini 3.1 Pro Preview Custom Tools, GPT-4.1, Claude Sonnet 5, Claude Sonnet 5.5, Gemini 3.1 Pro Preview, Qwen3.8 2.4T A95B, Gemini 3.5 Flash

Capabilities side by side

Only what our records list

Gemini 3.1 Pro Preview Custom Tools
GPT-4.1
Vision input
Not disclosed
Not disclosed
Audio input
Not disclosed
Not disclosed
Open weights
Not marked open
Not marked open
Batch tier
Not listed
Supported
Free tier
Not listed
Not listed
Thinking tier
Not listed
Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose Gemini 3.1 Pro Preview Custom Tools if…

  • your prompts are long: it takes 1,048,576 tokens against 1,047,576

Choose GPT-4.1 if…

  • output dominates your bill: $8.00 per 1M output against $12.00
  • work can wait: it lists a batch tier and the other does not

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is Gemini 3.1 Pro Preview Custom Tools better than GPT-4.1?
We do not benchmark quality, so we cannot say. On the recorded numbers: Gemini 3.1 Pro Preview Custom Tools and GPT-4.1 cost the same on input, $2.00 per 1M tokens. Gemini 3.1 Pro Preview Custom Tools has the larger context window (1.05M against 1.05M tokens). For a support chatbot at 10,000 chats a day, the standard-tier bill is about $1,980 a month for Gemini 3.1 Pro Preview Custom Tools and $1,620 for GPT-4.1. Which is better for you depends on your task; test both on your own prompts.
Which is cheaper, Gemini 3.1 Pro Preview Custom Tools or GPT-4.1?
They cost the same on input, $2.00 per 1M tokens. Output is $12.00 for Gemini 3.1 Pro Preview Custom Tools and $8.00 for GPT-4.1.
How much does each cost per 1M tokens?
Gemini 3.1 Pro Preview Custom Tools: $2.00 input and $12.00 output. GPT-4.1: $2.00 input and $8.00 output. Standard tier, USD.
Which has the larger context window?
Gemini 3.1 Pro Preview Custom Tools, with 1,048,576 tokens. GPT-4.1 has 1,047,576 tokens.
Do both offer batch pricing?
Gemini 3.1 Pro Preview Custom Tools lists no batch tier. GPT-4.1 lists a batch tier, at 50% of its standard price.
Can both read images or audio?
Input types recorded for Gemini 3.1 Pro Preview Custom Tools: none recorded. For GPT-4.1: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.
Is either model open-weight?
Gemini 3.1 Pro Preview Custom Tools: not marked open-weight in our records. GPT-4.1: not marked open-weight in our records.
What would each cost for a support chatbot?
At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $1,980 a month for Gemini 3.1 Pro Preview Custom Tools and $1,620 for GPT-4.1. This is our calculation from the listed prices, not a quote.

About the two models

Gemini 3.1 Pro Preview Custom Tools

By Google. $2.00 input and $12.00 output per 1M tokens, 1.05M context, atlas square E5. Tiers listed: standard.

Full specs & pricing →

GPT-4.1

By OpenAI. $2.00 input and $8.00 output per 1M tokens, 1.05M context, atlas square E5. Tiers listed: batch, standard.

Full specs & pricing →

Compare Gemini 3.1 Pro Preview Custom Tools with…

Keep going in your AI

Opens with this page as the source. We add nothing else to the prompt.