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Amazon Titan Text Express vs Trinity Large Preview

This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.

Amazon

Model

Amazon Titan Text Express

Context window

42K

42,000 tokens · ~32K words

Model page
Arcee Ai

Model

Trinity Large Preview

Tool calling

Context window

131K

131,000 tokens · ~98K words

Model page

Context window · side by side

Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.

Amazon Titan Text Express42K
Trinity Large Preview131K

Trinity Large Preview has about 3.1× the context window of the other in this pair.

Trinity Large Preview has 211% more context capacity (131K vs 42K tokens).

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Trinity Large Preview. Its 131K context fits entire documents without chunking (vs 42K).

Full specs

Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.

SpecAmazon Titan Text ExpressTrinity Large Preview
Context window42,000 tokens (42K)131,000 tokens (131K)
Max output tokens8,000 tokens (8K)N/A
Speed tierBalancedDeep
VisionNoNo
Function callingNoYes
Extended thinkingNoNo
Prompt cachingNoNo
Batch APINoNo
Release dateN/AJan 2026

Pricing matrix

Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.

ProviderAmazon Titan Text Express inAmazon Titan Text Express outTrinity Large Preview inTrinity Large Preview out
Aws Bedrock$1.30/M$1.70/M

Frequently asked questions

Trinity Large Preview has a larger context window: 131K tokens vs 42K. For long documents, large codebases, or extended agent sessions, the larger context window reduces the need to chunk inputs or summarize history.

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Example: a multi-turn chat session

Without Mem0~128K tokens sent
Full history
Repeated info
Old context
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