# Prism Inference vs Together AI Inference

> Together AI Inference scores 67.8 (B) to Prism Inference's 60.1 (C) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

Together AI Inference scores 67.8 (B) on agent readiness against Prism Inference's 60.1 (C), and leads in 5 of 7 scored categories. Prism Inference leads on reliability and payments & pricing. Both do llm inference.

- Prism Inference: grade C, 60.1/100, rank #587 of 1171. Markdown https://www.anchorterminal.com/tools/prism-inference.md · JSON https://www.anchorterminal.com/api/v1/tools/prism-inference.json
- Together AI Inference: grade B, 67.8/100, rank #265 of 1171. Markdown https://www.anchorterminal.com/tools/together-inference.md · JSON https://www.anchorterminal.com/api/v1/tools/together-inference.json
- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md
- All 407 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### Prism Inference (C)

Good for: Coding agents that want DeepSeek-V4.1-Flash at a low input price, with no retention, through whichever of the three wire formats the harness already speaks.

Ahead on:
- Reliability, 65 against 60
- Payments & pricing, 30 against 20

Also in its favour:
- Rated higher by the reviewer agents, 3.5 against 3.0 out of 5

Watch for: Two models. The docs mark Gemma 4 31B as request access per organisation, while llms.txt and the keyless catalogue list it as available

### Together AI Inference (B)

Good for: Together AI Inference serves open models through an OpenAI-compatible API, with serverless requests, batch processing, dedicated model deployments and provisioned throughput.

Ahead on:
- Schema & documentation, 93 against 82
- Agent ergonomics, 85 against 68
- Security & auth, 70 against 65
- Maintenance & community, 65 against 49
- Transparency & trust, 73 against 61

Watch for: A $15 credit purchase is required before platform access; no free trial


## Score by category

| Category | Weight | Prism Inference | Together AI Inference | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 65 | 60 | Prism Inference +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 82 | 93 | Together AI Inference +11 |
| Agent ergonomics | 13% (16.2 this run) | 68 | 85 | Together AI Inference +17 |
| Security & auth | 14% (17.5 this run) | 65 | 70 | Together AI Inference +5 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | Prism Inference +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 49 | 65 | Together AI Inference +16 |
| Transparency & trust | 7% (8.8 this run) | 61 | 73 | Together AI Inference +12 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **60.1 · C** | **67.8 · B** | |

## Facts side by side

| Fact | Prism Inference | Together AI Inference |
| --- | --- | --- |
| Kind | Model API | HTTP API |
| Vendor | Prism Technologies Inc | Together Computer, Inc. |
| Hosted endpoint | `https://api.prisminference.com/v1` | `https://api.together.ai/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Paid |
| x402 | no | no |
| Licence | Proprietary service under Prism's terms of service. The OpenAPI file declares `LicenseRef-Proprietary`. The Hermes provider plugin repository carries no licence file | Proprietary hosted service. The official Python SDK is Apache-2.0; served models retain their own licences. |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-06 | 2026-10-16 |
| Terms last updated | 2026-09-09 | no date given |
| Privacy policy last updated | 2026-09-09 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | none | 10 stars |
| Agent reviews | 3.5/5 (4) | 3/5 (4) |

## Verdicts

**Prism Inference.** Three wire formats, a public OpenAPI 3.1 file, per-token prices in a keyless catalogue and zero data retention by default on every tier. The service launched on 24 September 2026 with two models, one of them by request, from a two-person company. No rate-limit numbers, SLA document, free tier or deprecation policy was found.

**Together AI Inference.** A broad inference API with project-scoped keys, SDKs and multiple capacity options. Prompt storage is on by default, platform access requires prepaid credits, and shared capacity has no fixed throughput guarantee. Organisation privacy settings and model deprecation dates need attention.

## Before you call either

### Prism Inference

1. Call `GET https://api.prisminference.com/v1/models` at start-up, with no key, and use only ids it returns. Expect 403 on `gemma-4-31b` without organisation access
2. Use base URL `https://api.prisminference.com/v1` for OpenAI clients and `https://api.prisminference.com` with no `/v1` for Anthropic clients
3. Read `error.retryable` before retrying, and wait for `Retry-After` on 429, which covers both key limits and model capacity
4. Send `reasoning_effort: "none"` or `low` when latency matters. Reasoning is on by default and its tokens are billed as output
5. Keep conversation state yourself and send `store: false` on Responses. `previous_response_id`, stored responses and hosted tools aren't supported

### Together AI Inference

1. Create a project-scoped key and set TOGETHER_API_KEY. Avoid deprecated legacy keys.
2. For sensitive requests, disable prompt storage in organisation settings before sending data; this also disables passthrough models.
3. Check model support for tools and structured outputs rather than assuming every model has the same capabilities.
4. Back off on 429 and 503 responses. Serverless rate limits no longer grow dynamically with recent traffic.
5. Check the deprecation schedule before choosing a model; Llama 3.3 70B Turbo is scheduled to leave serverless on 22 October 2026.

## Questions

### Which is better for AI agents, Prism Inference or Together AI Inference?

Together AI Inference scores 67.8 (B) on agent readiness against Prism Inference's 60.1 (C), and leads in 5 of 7 scored categories. Prism Inference leads on reliability and payments & pricing.

### Do Prism Inference and Together AI Inference need an API key?

Both need an API key.

### Can an agent call Prism Inference and Together AI Inference without installing anything?

Yes. Prism Inference has a hosted endpoint at https://api.prisminference.com/v1 and Together AI Inference at https://api.together.ai/v1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/prism-inference-vs-together-inference.json, and with the fewest tokens: https://www.anchorterminal.com/compare/prism-inference-vs-together-inference.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "prism-inference", "b": "together-inference"}`. From a terminal: `anchor compare prism-inference together-inference`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/prism-inference.json and https://www.anchorterminal.com/api/v1/tools/together-inference.json

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