llmboard.aiAI model intelligence
Home

Model Rankings

OverallOpen ModelsAgentCodingReasoningMathKnowledgeInstruction FollowingTextVision
Image GenerationImage Editing
Video GenerationImage to VideoVideo Editing
Text to SpeechSpeech to Text
Embeddings

Efficiency

Chat Token PricingImage PricingVideo PricingAudio Pricing
Chat Speed & LatencyProvider Reliability

Benchmarks

GPQAMMLU-ProAIME 2025SWE-Bench VerifiedMMLUHumanity's Last ExamLiveCodeBenchMATHHumanEvalMMMU-Pro
All Benchmarks

Tools

Model DirectoryCompare Models

Scoring & Data

Scoring & Data
393 models668 benchmarks

Leaderboard Center

Overall RankingCodingCore BenchmarksPrice & ValueRuntime Performance

Modalities

All ModelsImage GenerationImage EditingVideo GenerationImage-to-VideoVideo EditingText-to-SpeechSpeech-to-TextEmbeddings

Data & Methods

Scoring MethodAll BenchmarksReasoningMath

Vendors

All VendorsOpenAIAnthropicGoogle
llmboard.aiCopyright 2026 llmboard.ai

Inworld model product

Realtime TTS-2 - Research Preview

Model ranked by Artificial Analysis.

Updated Aug 18, 2026. Default version: Realtime TTS-2 - Research Preview

Compare
LLMBoard Text-to-Speech Score63.7Realtime TTS-2 - Research Preview
Coverage35%1 benchmark families
Context windowN/ATokens
Native catalog priceN/APrice unavailable

On this page

  • Capability
  • Benchmarks
  • Arena
  • Pricing
  • Runtime
  • Specification
  • Versions
  • Compare
  • Similar models
  • About
  • FAQ

Realtime TTS-2 - Research Preview Capability Profile

This profile uses the model's current scored version. Arena ratings and prices are shown separately.

Realtime TTS-2 - Research Preview LLMBoard score breakdown

Realtime TTS-2 - Research Preview Benchmark Results

Benchmark scores for Realtime TTS-2 - Research Preview.

1 rows
Columns

Show columns

Sort by
Benchmark
Score
Rank
Participants
Percentile
Evidence
Evaluated
BenchmarkArtificial Analysis Text To SpeechScore1,187 EloRank09Participants93PercentileN/AEvidenceAEvaluatedAug 18, 2026

Realtime TTS-2 - Research Preview Arena Results

Preference and agent-evaluation results for the default version.

No Arena results

The default version does not have a matching Arena result yet.

Realtime TTS-2 - Research Preview Pricing

Prices are shown in the model's native media unit and resolution tier.

Native price
N/A
Price unit
N/A
Tier
Standard
Tracked offerings
0
No price available

This model does not have a current media price.

Media catalog prices are not converted into token input or output prices.

Realtime TTS-2 - Research Preview Runtime Performance

Provider-specific output speed and catalog latency for Realtime TTS-2 - Research Preview. Runtime does not affect the capability score.

No runtime data

No provider-specific speed or latency record is linked to the default version yet.

Browse runtime rankings

Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.

Realtime TTS-2 - Research Preview Specifications

Technical details for the model's default version.

Version
Realtime TTS-2 - Research Preview
Released
Unknown
Knowledge cutoff
Unknown
Parameters
N/A
Context window
N/A
Max output
N/A
Inputs
text
Outputs
audio
Open weights
No
License
Unspecified

Realtime TTS-2 - Research Preview Versions

Available versions of this model. The score column identifies the version used in the overall ranking.

1 rows
Columns

Show columns

Sort by
Version
Released
LLMBoard
Parameters
Context
Max output
Open weights
License
VersionRealtime TTS-2 - Research PreviewReleasedN/ALLMBoard63.7ParametersN/AContextN/AMax outputN/AOpen weightsN/ALicenseUnspecified

Realtime TTS-2 - Research Preview vs nearby models

Open a comparison with the three ranked models immediately above and below this model.

Realtime TTS-2 - Research PreviewvsSonic 3.5Realtime TTS-2 - Research PreviewvsRealtime TTS 1.5 MaxRealtime TTS-2 - Research PreviewvsLightning V3.1 Pro (Jul 2026)Realtime TTS-2 - Research PreviewvsSpeech 2.8 HDRealtime TTS-2 - Research PreviewvsGradium TTS BetaRealtime TTS-2 - Research PreviewvsFalcon 2

Models similar to Realtime TTS-2 - Research Preview

Recommendations prioritize the same model type and family, then the closest LLMBoard score.

#7+0.7
IN

Realtime TTS 1.5 Max

Inworld

64.4 LLMBoard

DetailsCompare
#19-4.0
IN

Realtime TTS 1.5 Mini

Inworld

59.8 LLMBoard

DetailsCompare
#8+0.4
SM

Lightning V3.1 Pro (Jul 2026)

Smallest.ai

64.1 LLMBoard

DetailsCompare
#10-0.7
MI

Speech 2.8 HD

MiniMax

63.0 LLMBoard

DetailsCompare
#6+1.1
CA

Sonic 3.5

Cartesia

64.8 LLMBoard

DetailsCompare
#11-1.3
GR

Gradium TTS Beta

Gradium

62.5 LLMBoard

DetailsCompare

What is Realtime TTS-2 - Research Preview?

Key information about Realtime TTS-2 - Research Preview and its available data.

Model ranked by Artificial Analysis.

Data as of 2026-08-17.

FAQ

Common questions about Realtime TTS-2 - Research Preview.

When was Realtime TTS-2 - Research Preview released?

A release date is not available for the default version.

How much does Realtime TTS-2 - Research Preview cost?

No native catalog price is currently available for Realtime TTS-2 - Research Preview.

Who created Realtime TTS-2 - Research Preview?

Realtime TTS-2 - Research Preview was created by Inworld.

What is the context window for Realtime TTS-2 - Research Preview?

A context window is not available for the default version.

Is Realtime TTS-2 - Research Preview open weight?

No. The default version is not marked as having publicly available weights.

How many API providers offer Realtime TTS-2 - Research Preview?

No provider offering is currently linked to the default version.

What models should I compare Realtime TTS-2 - Research Preview with?

Nearby ranked alternatives include Sonic 3.5, Realtime TTS 1.5 Max, Lightning V3.1 Pro (Jul 2026).