Specification

Family: Gemini
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Context window: 8.19K tokens
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Max output: 16.4K tokens
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Modalities: audio, text
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Input modalities: text
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Output modalities: audio
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
API model id: gemini-2.5-pro-preview-tts
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Official page: ai.google.dev/gemini-api/docs/models/gemini-2.5-pro-preview-tts
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Capabilities: Audio generation
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Latest update: 2025-12
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh

Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →

Provenance

Attributed facts

14

Source tiers

T114

Freshest observation

2 h ago

Conflicts

None

Modalities

Modalities: audiotext
Input: text
Output: audio

Capabilities

Tool calling
No
Google AI for Developers (Gemini API docs) · T1
Structured output
No
Google AI for Developers (Gemini API docs) · T1
Reasoning
No
Google AI for Developers (Gemini API docs) · T1
Vision
Unavailable
Audio
Unavailable
Fine-tuning available
Unavailable

Context window: 8.19K tokens
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh
Max output: 16.4K tokens
Source:Google AI for Developers (Gemini API docs)T1observed 2 h agohigh

No benchmark results recorded

Results appear when a tier 1–3 source publishes them; we never copy scores without a source.

Current prices

Current prices per 1M tokens
Provider	Input / 1M	Output / 1M	Cached in	Batch in / out	Context	Observed	Source
Google Gemini APIgemini-2.5-pro-preview-tts	$1	$20	—	$0.50 / $10	—	2 h ago	ai.google.devT1

USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.

Available through 1

Google Gemini API

Price history

Input price · USD / 1M tokens

Output price · USD / 1M tokens

Google Gemini API

No hardware estimate available

Estimates need a parameter count; this model has none recorded from a source.

No lineage recorded

Lineage comes from explicit `derived_from`, `fine_tuned_from`, `distilled_from` and `quantized_from` relations stated by sources.

Papers 0

No papers linked yet.

Repositories 0

No repositories linked yet.

As of

Rewind the record: see this entity's attributes exactly as AI Atlas knew them on a given day.

Claim history

14 claims · 14 properties

Familyfamily1

Claim history for Family
Value	Valid from → to	Status	Source	Confidence	Extractor
Gemini	11 Sept 2026 20:51 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Context windowcontext_length1

Claim history for Context window
Value	Valid from → to	Status	Source	Confidence	Extractor
8.19K tokens	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Max outputmax_output_tokens1

Claim history for Max output
Value	Valid from → to	Status	Source	Confidence	Extractor
16.4K tokens	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Modalitiesmodalities1

Claim history for Modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
audio, text	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Input modalitiesmodalities_input1

Claim history for Input modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
text	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Output modalitiesmodalities_output1

Claim history for Output modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
audio	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

API model idapi_model_id1

Claim history for API model id
Value	Valid from → to	Status	Source	Confidence	Extractor
gemini-2.5-pro-preview-tts	11 Sept 2026 20:51 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Official pageofficial_url1

Claim history for Official page
Value	Valid from → to	Status	Source	Confidence	Extractor
https://ai.google.dev/gemini-api/docs/models/gemini-2.5-pro-preview-tts	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Capabilitiescapabilities1

Claim history for Capabilities
Value	Valid from → to	Status	Source	Confidence	Extractor
Audio generation	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Descriptiondescription1

Claim history for Description
Value	Valid from → to	Status	Source	Confidence	Extractor
High-fidelity speech synthesis optimized for quality in structured workflows like podcasts and audiobooks.	11 Sept 2026 20:51 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Latest updatelatest_update1

Claim history for Latest update
Value	Valid from → to	Status	Source	Confidence	Extractor
2025-12	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Reasoningreasoning1

Claim history for Reasoning
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Structured outputstructured_output1

Claim history for Structured output
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Tool callingtool_calling1

Claim history for Tool calling
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 20:55 UTC → current	current	Google AI for Developers (Gemini API docs)T1	high	deterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

11 Sept 2026
New modelModelGemini 2.5 Pro Preview TTSGoogle
New model: Gemini 2.5 Pro Preview TTS (Google)
google
ai.google.dev
11 Sept 2026
Listed by providerModelGemini 2.5 Pro Preview TTSGoogle
Google Gemini API lists Gemini 2.5 Pro Preview TTS at $1 in / $20 out per 1M tokens
google
ai.google.dev

Full timeline →

Source documents
Source	Document	Type	Tier	Last observed	Snapshots
Google AI for Developers (Gemini API docs)	ai.google.dev/gemini-api/docs/models/gemini-2.5-pro-preview-tts	model_page	T1· Official	2 h ago	2
Google AI for Developers (Gemini API docs)	ai.google.dev/gemini-api/docs/models	model_docs	T1· Official	2 h ago	3
Google AI for Developers (Gemini API docs)	ai.google.dev/gemini-api/docs/pricing	pricing	T1· Official	2 h ago	3

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.