# TypeSafe AI vs Particle.AI

> Particle serves cheap Flash-class LLMs with 1M context; TypeSafe's Jev returns typed decisions in about 100ms. They overlap on classification and little else.

Canonical: https://www.subconscious.dev/compare/typesafe-ai-vs-particle-ai · By The Subconscious Team · Updated September 30, 2026

## How they compare

This pair only overlaps on cheap, high-volume calls. Particle.AI serves Flash-class open models through Vercel AI Gateway, like GLM 5.3 Flash at $0.10 in and $0.40 out, with 1M context and cache reads at $0.03 per million. Its pitch is cheap high-volume calls, which can include classification. TypeSafe's Jev targets that job with a different design. Developers define the answer space, and Jev returns a typed answer with calibrated probabilities in about 100ms, at what TypeSafe calls a fraction of an LLM call's cost.

Latency is a clear gap. Particle's DeepSeek V4.1 Flash listing shows about 3.5 seconds of latency, while Jev finishes most calls in about 100ms, and Jev cannot return a label outside its schema. Particle's advantage is range: its models write text, summarize long documents across 1M tokens and answer open questions, none of which Jev does. Both are early. Particle has a tiny catalog and little track record, and Jev is early access with text-only input. For decisions, test Jev. For generation, Particle is the option of the two.

## What each one does

### TypeSafe AI

TypeSafe AI builds decision models instead of text generators. Founder Diogo Almeida co-invented RLHF and InstructGPT at OpenAI and later worked at Google Brain. After two years in stealth the company released its first System One Model, Jev, in early access. The name nods to Kahneman's fast System 1 thinking, and the model is built for machines to call, not people to chat with.

### Particle.AI

Particle AI is an early San Francisco infrastructure startup with a mission to make intelligence as cheap and abundant as electricity. The team works on post-training, inference optimization and distributed systems, all aimed at pushing down cost per unit of intelligence. It is still hiring its founding team and works fully in person. Public detail about funding and founders is thin as of this writing.

## Which is best, and when

### Choose TypeSafe AI for

- Classification that needs answers in about 100ms
- Decisions with calibrated confidence for escalation
- Schema-safe labels with no invalid outputs

### Choose Particle.AI for

- Cheap text generation on Flash-class models
- Long documents with 1M context
- A low-cost route inside Vercel AI Gateway

## At a glance

| Attribute | TypeSafe AI | Particle.AI |
|---|---|---|
| Model access | Decision models | Open weights |
| Flagship models | Jev, jev-1.13 | DeepSeek V4.1 Flash, GLM 5.3 Flash |
| Speed | ~100ms per call | ~157 tok/s on DeepSeek V4.1 Flash |
| Price | A fraction of an LLM call | $0.10 in, $0.40 out (GLM 5.3 Flash) |
| Customization | - | - |
| Deployment | Early-access API | Via Vercel AI Gateway |
| Long context | - | 1M |

## FAQ

### What is the difference between TypeSafe AI and Particle.AI?

Particle serves cheap Flash-class LLMs with 1M context; TypeSafe's Jev returns typed decisions in about 100ms. They overlap on classification and little else.

### When should I choose TypeSafe AI over Particle.AI?

Classification that needs answers in about 100ms; Decisions with calibrated confidence for escalation; Schema-safe labels with no invalid outputs.

### When should I choose Particle.AI over TypeSafe AI?

Cheap text generation on Flash-class models; Long documents with 1M context; A low-cost route inside Vercel AI Gateway.

### Is TypeSafe AI or Particle.AI cheaper?

TypeSafe AI: A fraction of an LLM call. Particle.AI: $0.10 in, $0.40 out (GLM 5.3 Flash). The cheaper choice depends on the model and workload.

## Running long-horizon agents?

If your agents run past 200K tokens, compare both against Subconscious: [Subconscious vs TypeSafe AI](https://www.subconscious.dev/compare/subconscious-vs-typesafe-ai.md), [Subconscious vs Particle.AI](https://www.subconscious.dev/compare/subconscious-vs-particle-ai.md).

Full profiles: [TypeSafe AI](https://www.subconscious.dev/providers/typesafe-ai.md), [Particle.AI](https://www.subconscious.dev/providers/particle-ai.md).