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Gemini 3.1 Pro Preview

API ID gemini-3.1-pro-preview

gemini-3.1-pro-preview is a preview Google model, released February 2026. It has a 1,048,576-token context window and up to 65,536 output tokens. It takes image and PDF input and supports function calling, structured outputs and reasoning. Standard price: from $2.00 input and from $12.00 output per 1M tokens.

Gemini 3.1 Pro Preview

Google's description
Status
Active
Released
February 2026
Shutdown
none announced
Replacement
—

No deprecation or shutdown date has been announced as of October 15, 2026.

Benchmarks

Scores as each source published them
or

Comparing with Gemini 3 Pro Preview, the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features

Arena

ArenaGemini 3.1 Pro PreviewGemini 3 Pro PreviewChangeRankDateSource
Text
By category
  • Math 1489 rank 29 vs 1477 (+12, within range)
  • Creative writing 1481 rank 12 vs 1484 (−3, within range)
  • Instruction following 1480 rank 21 vs 1472 (+8, within range)
  • Hard prompts 1508 rank 19 vs 1502 (+6, within range)
  • Long prompts 1499 rank 16 vs 1491 (+8, within range)
  • Multi-turn 1496 rank 13 vs 1496 (0, within range)
  • Expert 1509 rank 31 vs 1499 (+10, within range)
1487 ±31485 ±4+2
within range		19 of 415
126,781 votes		Oct 13, 2026source
Text: Coding1521 ±51517 ±7+4
within range		33 of 410
34,861 votes		Oct 13, 2026source
WebDev1447 ±51440 ±8+7
within range		72 of 142
24,269 votes		Oct 13, 2026source
Vision1280 ±51289 ±7−9
within range		29 of 165
46,320 votes		Oct 9, 2026source
Search1207 ±51201 ±5+6
within range		14 of 42
151,436 votes		Oct 13, 2026source
Document1459 ±51451 ±9+8
within range		27 of 44
49,457 votes		Sep 13, 2026source
Agent-0.035 ±0.014not rated41 of 54
87,156 sessions		Oct 14, 2026source

Rated as gemini-3.1-pro-preview; Gemini 3 Pro Preview as gemini-3-pro. Text, WebDev, Vision, Search and Document ratings come from people voting between two anonymous answers; Text, Vision, Search and Document are style-controlled, as on arena.ai. Agent is Arena's separate score for real agent sessions, on its own scale. Data: Arena (arena.ai), CC BY 4.0.

Epoch AI

BenchmarkGemini 3.1 Pro PreviewGemini 3 Pro PreviewChangeSettingRunSource
FrontierMath Tier 426.8%not runJun 11, 2026source
FrontierMath Tiers 1-359.6%not runJun 11, 2026source
GPQA Diamond
Other settings
  • 94.1% vs 92.6%
94.4%92.6%+1.8 ptshigh effort (vs no setting)Aug 6, 2026source
OTIS Mock AIME 2024-2025
Other settings
  • 95.6% vs 91.4%
95.6%91.4%+4.2 ptshigh effort (vs no setting)Aug 6, 2026source
SimpleQA Verified73.5%not runhigh effortAug 10, 2026source

Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.

Aliases pointing here: gemini-3-pro-preview (since March 9, 2026, per Google)

Features

Compare models
FeatureValueSinceSource
Structured outputsThe model can be held to a JSON schema you supply, so every reply parses without retries or cleanup.Supportedin place when tracking began (October 6, 2026)source
Function callingAlso called tool use. You describe functions; the model replies with a function name and arguments for your code to run, then uses the result.Supportedin place when tracking began (October 6, 2026)source
Prompt cachingA prompt prefix you send again and again (system prompt, documents, tools) is cached, so later requests cost less and start faster.Supportedin place when tracking began (October 6, 2026)source
Batch APISend many requests as one job that runs in the background, usually finished within 24 hours, at a lower price than live requests.Supportedin place when tracking began (October 6, 2026)source
Image inputImages such as screenshots, photos and charts can go in the prompt for the model to read.Supportedin place when tracking began (October 6, 2026)source
PDF inputPDF files can go in the prompt directly, without converting them to text first.Supportedin place when tracking began (October 6, 2026)source
Reasoning / thinkingThe model can work through a problem step by step before it answers: usually better answers to hard questions, at the cost of more tokens and time.Supportedin place when tracking began (October 6, 2026)source
Built-in web searchThe company's API can search the web for the model during a request and cite its sources; you don't need a search service of your own.Supportedin place when tracking began (October 6, 2026)source
Context windowThe most the model can work with in one request, in tokens: your prompt, conversation history and files. A token is about three-quarters of an English word.1,048,576 tokensin place when tracking began (October 6, 2026)source
Max output tokensThe longest reply the model can write in one response, in tokens. A token is about three-quarters of an English word.65,536 tokensin place when tracking began (October 6, 2026)source

Not published by Google: Fine-tuning, temperature parameter, top_p parameter, logprobs.

Price history

USD per 1M tokens, standard tier
$0.00$5.00$10.00$15.00Oct 2026In $2.00Out $12.00Oct 1, 2026 to Oct 15, 2026: Input $2.00, Output $12.00
$0.00$5.00$10.00$15.00Oct 2026In $2.00Out $12.00Oct 1, 2026 to Oct 15, 2026: Input $2.00, Output $12.00

We started recording this model's prices on Oct 1, 2026. The history grows with each daily check.

Show as a table
FromTypePrice
Oct 1, 2026Input$2.00
Oct 1, 2026Output$12.00

Prices

USD per 1M tokens, every type and band, by tier
TypeBandPrice $/1MIn effect
Standard
inputup to 200k prompt$2.00
inputover 200k prompt$4.00
cached inputup to 200k prompt$0.20
cached inputover 200k prompt$0.40
outputup to 200k prompt$12.00
outputover 200k prompt$18.00
cache storage per hour—$4.50
Batch
inputup to 200k prompt$1.00
inputover 200k prompt$2.00
cached inputup to 200k prompt$0.20
cached inputover 200k prompt$0.40
outputup to 200k prompt$6.00
outputover 200k prompt$9.00
cache storage per hour—$4.50
Flex
inputup to 200k prompt$1.00
inputover 200k prompt$2.00
cached inputup to 200k prompt$0.20
cached inputover 200k prompt$0.40
outputup to 200k prompt$6.00
outputover 200k prompt$9.00
cache storage per hour—$4.50
Priority
inputup to 200k prompt$3.60
inputover 200k prompt$7.20
cached inputup to 200k prompt$0.36
cached inputover 200k prompt$0.72
outputup to 200k prompt$21.60
outputover 200k prompt$32.40
cache storage per hour—$8.10

Changelog

Changes we detected on Google's pages

No changes recorded yet.

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Last checked · Sources: Google deprecations, Google pricing, Google models, Google aliases, Google api models