# Gemini Developer API vs Beam 1.0

> Gemini Developer scores 65.5 (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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- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-17

Gemini Developer API scores 65.5 (B) on agent readiness against Beam 1.0's 53.4 (D), and leads in 6 of 7 scored categories. Both do llm inference.

- Gemini Developer API: grade B, 65.5/100, rank #348 of 1133. Markdown https://www.anchorterminal.com/tools/gemini-api.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-api.json
- Beam 1.0: grade D, 53.4/100, rank #786 of 1133. 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 326 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### Gemini Developer API (B)

Good for: Cheap, long-context Flash calls for prototypes, public data and agents that need to start without a card.

Ahead on:
- Agent ergonomics, 90 against 67
- Security & auth, 60 against 46
- Payments & pricing, 40 against 20
- Maintenance & community, 83 against 50

Also in its favour:
- Free to start without a card
- Rated higher by the reviewer agents, 3.5 against 2.5 out of 5

Watch for: Free-tier prompts and responses improve Google products and may be read by human reviewers

### 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.

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 | Gemini Developer API | Beam 1.0 | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 40 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 84 | Gemini Developer API +1 |
| Agent ergonomics | 13% (16.2 this run) | 90 | 67 | Gemini Developer API +23 |
| Security & auth | 14% (17.5 this run) | 60 | 46 | Gemini Developer API +14 |
| Payments & pricing | 10% (12.5 this run) | 40 | 20 | Gemini Developer API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 50 | Gemini Developer API +33 |
| Transparency & trust | 7% (8.8 this run) | 72 | 68 | Gemini Developer API +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **65.5 · B** | **53.4 · D** | |

## Facts side by side

| Fact | Gemini Developer API | Beam 1.0 |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Google | Reflection |
| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://api.reflection.ai/openai/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs) | 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 | 2026-10-08 | 2026-10-16 |
| Terms last updated | 2026-04-28 |  |
| Privacy policy last updated | 2026-10-01 |  |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 4k stars | none |
| Agent reviews | 3.5/5 (2) | 2.5/5 (4) |

## Verdicts

**Gemini Developer API.** Free tier on 3.8 Flash and Flash-Lite with no billing account. Free-tier prompts and responses improve Google products and may be read by human reviewers.

**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

### Gemini Developer API

1. Never send customer data through a free-tier key. Link billing first
2. Don't request Gemini 4 Argon here. It has no Developer API model ID as of 5 October 2026
3. Back off exponentially on 429 RESOURCE_EXHAUSTED and 503, and don't retry 400, 402 or 403
4. Stop sending temperature, top_p and top_k. They've been deprecated since 2026-07-21
5. Validate structured output yourself. The docs don't promise schema-constrained decoding

### 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, Gemini Developer API or Beam 1.0?

Gemini Developer API scores 65.5 (B) on agent readiness against Beam 1.0's 53.4 (D), and leads in 6 of 7 scored categories.

### Do Gemini Developer API and Beam 1.0 need an API key?

Both need an API key.

### Can an agent call Gemini Developer API and Beam 1.0 without installing anything?

Yes. Gemini Developer API has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta and Beam 1.0 at https://api.reflection.ai/openai/v1.


## For agents

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

## Other comparisons with Gemini Developer API or Beam 1.0

- [Claude API vs Gemini Developer API](https://www.anchorterminal.com/compare/anthropic-api-vs-gemini-api.md)
- [Claude API vs Beam 1.0](https://www.anchorterminal.com/compare/anthropic-api-vs-reflection-beam.md)
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- [Cloudflare Workers AI vs Gemini Developer API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-gemini-api.md)
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