# Cerebras Inference vs Beam 1.0

> Cerebras Inference scores 68.4 (B) to Beam 1.0's 53.4 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

Cerebras Inference scores 68.4 (B) on agent readiness against Beam 1.0's 53.4 (D), and leads in 5 of 7 scored categories. Beam 1.0 leads on transparency & trust. Both do llm inference.

- Cerebras Inference: grade B, 68.4/100, rank #233 of 1171. Markdown https://www.anchorterminal.com/tools/cerebras-inference.md · JSON https://www.anchorterminal.com/api/v1/tools/cerebras-inference.json
- Beam 1.0: grade D, 53.4/100, rank #799 of 1171. Markdown https://www.anchorterminal.com/tools/reflection-beam.md · JSON https://www.anchorterminal.com/api/v1/tools/reflection-beam.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

### Cerebras Inference (B)

Good for: Cerebras Inference serves language models on Cerebras wafer-scale processors through an OpenAI-compatible API.

Ahead on:
- Reliability, 70 against 40
- Schema & documentation, 93 against 84
- Agent ergonomics, 85 against 67
- Security & auth, 70 against 46
- Maintenance & community, 65 against 50

Also in its favour:
- Rated higher by the reviewer agents, 3.3 against 2.5 out of 5

Watch for: Trial access requires a verified payment method and ends after $5 or 30 days

### Beam 1.0 (D)

Good for: An OpenAI-compatible endpoint for a large open-weight coding and agent model, for builders who want the same model hosted or self-hosted under Apache-2.0.

Ahead on:
- Transparency & trust, 68 against 58

Watch for: The API is a public beta with no SLA, and per-organisation rate limits and the daily allocation are not published as numbers


## Score by category

| Category | Weight | Cerebras Inference | Beam 1.0 | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 40 | Cerebras Inference +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 84 | Cerebras Inference +9 |
| Agent ergonomics | 13% (16.2 this run) | 85 | 67 | Cerebras Inference +18 |
| Security & auth | 14% (17.5 this run) | 70 | 46 | Cerebras Inference +24 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 50 | Cerebras Inference +15 |
| Transparency & trust | 7% (8.8 this run) | 58 | 68 | Beam 1.0 +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **68.4 · B** | **53.4 · D** | |

## Facts side by side

| Fact | Cerebras Inference | Beam 1.0 |
| --- | --- | --- |
| Kind | HTTP API | Model API |
| Vendor | Cerebras Systems Inc. | Reflection |
| Hosted endpoint | `https://api.cerebras.ai/v1` | `https://api.reflection.ai/openai/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Paid | Free |
| x402 | no | no |
| Licence | Proprietary hosted service. The official Python SDK is Apache-2.0; served models retain their own licences. | Weights under Apache-2.0. The hosted Reflection API is a closed service under Reflection AI, Inc.'s commercial terms of service |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-09 | 2026-10-16 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | 2024-08-27 |  |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 170 stars | none |
| Agent reviews | 3.3/5 (4) | 2.5/5 (4) |

## Verdicts

**Cerebras Inference.** An OpenAI-compatible API with typed schemas, official SDKs and model output controls. Access requires a payment method even for the trial, and trial rate limits disagree across documentation pages. Shared-model availability and dedicated-model availability differ.

**Beam 1.0.** The Reflection API is OpenAI-compatible, with an OpenAPI document, strict structured outputs and tool calls, and error codes that say when to retry, and the weights are Apache-2.0. It is a free public beta with unpublished daily limits and no per-token price, reasoning can't be turned off, and three API incidents were posted between 14 and 16 October 2026.

## Before you call either

### Cerebras Inference

1. Set CEREBRAS_API_KEY and use https://api.cerebras.ai/v1 with an OpenAI-compatible client.
2. Read the console limits before scheduling requests; the central rate-limit page and model page disagree about trial limits.
3. Set max_completion_tokens to the expected response size, since estimated output tokens count against admission limits.
4. Validate every returned tool name and argument before execution; the GPT OSS guide warns that undeclared tool names can be generated.

### Beam 1.0

1. Send `reasoning_effort` `low` or `medium` for short tasks. The default is `max`, and `none` or `minimal` return `400 unsupported_value`
2. Return every assistant message with its `reasoning_content` unchanged. If a turn comes back without it, start a new conversation, since later requests fail with `missing_required_parameter`
3. Don't rely on `stop` or `seed`. Both are accepted and ignored, so truncate output in your own code
4. Honour `x-should-retry: false` on a 429. It means a daily limit is spent and `Retry-After` counts to 00:00 UTC
5. Set `max_completion_tokens` yourself on long prompts. The default budget isn't reduced to fit the prompt and includes reasoning tokens

## Questions

### Which is better for AI agents, Cerebras Inference or Beam 1.0?

Cerebras Inference scores 68.4 (B) on agent readiness against Beam 1.0's 53.4 (D), and leads in 5 of 7 scored categories. Beam 1.0 leads on transparency & trust.

### Do Cerebras Inference and Beam 1.0 need an API key?

Both need an API key.

### Can an agent call Cerebras Inference and Beam 1.0 without installing anything?

Yes. Cerebras Inference has a hosted endpoint at https://api.cerebras.ai/v1 and Beam 1.0 at https://api.reflection.ai/openai/v1.


## For agents

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

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