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Google DeepMindGemini 2.5 familyLegacyReasoning modelReleased 17 Jun 2025

Gemini 2.5 Pro

Former flagship reasoning model (2025). Keep only for existing workloads.

Model idgemini-2.5-pro

Price$1.25 in, $10 out per 1M tokens

Checked29 September 2026

Knows up to January 2025

2,037events after its cutoff

90 historic, 476 major. 651 days of news.

It launched on 17 June 2025, already missing 19 of them. Coverage before 2026 is thin (80 entries for 2025), so this count is a floor.

Five things it has never heard of

Its cutoff, January 2025, is before this chart starts: every mark here is news it has never seen.

How to call it

3 ways to use Gemini 2.5 Pro, with the model id each provider expects.

Providers, model ids, endpoints and docs for Gemini 2.5 Pro
ProviderModel idEndpointDocs
Gemini API gemini-2.5-pro https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-pro:generateContent ai.google.dev
Google Cloud Gemini Enterprise Agent Platform (Vertex AI) gemini-2.5-pro docs.cloud.google.com
OpenRouter google/gemini-2.5-pro

Pricing

Prices for Gemini 2.5 Pro
Input$1.25 per 1M tokens
Output$10 per 1M tokens

As published: “per 1M tokens (Standard, prompts <=200k; >200k: $2.50 in / $15.00 out)”.

Source: ai.google.dev, checked 29 September 2026.

Specs

Input
Text, images, audio, video and PDF
Output
Text
Context window
1,048,576 tokens
Max output
65,536 tokens
Open weights
No
Licence
Proprietary
Training cutoff
January 2025
Released
17 June 2025
Status
Legacy
Type
Reasoning model

What stands out

What its maker marketed at launch, and what people found later, each with its source.

  • Thinking model with 1M context

    Built-in thinking plus 1,048,576-token multimodal input and 65K output; Search/Maps grounding, code execution, URL context.

    Source: ai.google.dev

  • Debuted

    First Gemini 2.5 ‘thinking model’; the March 2025 experimental release topped LMArena by a significant margin and led coding/math/science benchmarks.

    Source: blog.google

  • Coding-agent backbone

    Found after launch

    Steepest demand growth of any Google model; powered tools such as Cursor and GitHub Copilot at GA.

    Source: developers.googleblog.com

Four assistants, one scale

Gemini 2.5 Pro is added as a fifth row. Each row runs from what the model knows (graphite) through the months between its cutoff and its launch (hatched) to today (pink).

  1. GPT-6 Astra 271 at launch, 1,863 today
  2. Claude Opus 5.5 372 at launch, 1,795 today
  3. Gemini 4 Hydrogen 1,863 at launch, 1,889 today
  4. Grok 4.7 387 at launch, 1,829 today
  5. Gemini 2.5 Pro 19 at launch, 2,037 today
Show as a table
ModelCutoffReleasedMissing at launchMissing today
GPT-6 AstraApril 20263 September 20262711,863
Claude Opus 5.5June 202622 September 20263721,795
Gemini 4 HydrogenMarch 202612 November 20261,8631,889
Grok 4.7May 202621 September 20263871,829
Gemini 2.5 ProJanuary 202517 June 2025192,037

Notes

First released as experimental 2025-03; GA 2025-06-17 (stable id; earlier preview ids e.g. gemini-2.5-pro-preview-*). No shutdown date, but Gemini API access is limited to projects that used it before; Google recommends 3.5 Flash-Lite or 3.8 Flash for new projects.

curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-pro:generateContent" \
  -H "x-goog-api-key: $GEMINI_API_KEY" -H "Content-Type: application/json" \
  -d '{"contents":[{"parts":[{"text":"Hello"}]}]}'

Sources: model page, pricing, deprecations.