> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mnemom.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Provider Support

> Honest per-provider coverage of every Mnemom feature — what works, what's partial, and what's not supported across Anthropic, OpenAI, and Gemini

# Provider Support

Mnemom sits in front of three upstream model providers: **Anthropic**, **OpenAI**, and **Gemini**. Safe House, AIP integrity checkpoints, CLPI policy enforcement, and DLP all route through a single gateway, but the **quality of each feature varies by provider** — because the underlying APIs differ in what they expose.

This page is the honest accounting: what Mnemom guarantees on each provider, what it partially guarantees, and what it cannot guarantee.

<Note>
  Where coverage is partial — particularly **OpenAI's integrity-checkpoint coverage** — Mnemom does not claim parity. The v1 commitment is honest per-provider differentiation, not uniform coverage. Marketing materials and the trust center reflect this.
</Note>

## Supported models

Models the v1 promise applies to. Listed in the gateway's `/models.json` registry; routed end-to-end through Safe House, AIP, CLPI, and DLP per the matrix below.

<CardGroup cols={3}>
  <Card title="Anthropic" icon="brain">
    Claude Opus 4.8
    Claude Opus 4.7
    Claude Sonnet 4.6
    Claude Haiku 4.5
  </Card>

  <Card title="OpenAI" icon="microchip">
    GPT-5
    GPT-5 Codex
    o3
    o3-mini
  </Card>

  <Card title="Gemini" icon="gem">
    Gemini 2.5 Pro
    Gemini 2.5 Flash
  </Card>
</CardGroup>

**Canonical model IDs** (what you pass in `model:` on a Mnemom API call):

```yaml theme={null}
# Supported tier. Mnemom's gateway exposes this set via
# /models.json with `supported: true` flag; passthrough models route
# but carry no v1 promise.
supported_models:
  anthropic:
    - claude-opus-4-8
    - claude-opus-4-7
    - claude-sonnet-4-6
    - claude-haiku-4-5-20251001
  openai:
    - gpt-5
    - gpt-5-codex
    - o3
    - o3-mini
  gemini:
    - gemini-2.5-pro
    - gemini-2.5-flash
```

Additional models may route through the gateway in **passthrough mode** — they work for inference but do not carry the v1 feature-correctness promise. See [Deprecation policy](#deprecation-policy) below.

## Feature coverage matrix

Each cell describes the v1 commitment level. Symbols:

* **✓** Fully supported. Tested in CI; Safe House features work identically to the Anthropic baseline.
* **⚠ Partial** — Provider exposes the feature, but with a documented limitation. See the supporting note.
* **N/A** — Provider does not expose this capability. Not a Mnemom limitation.

| Capability                          | Anthropic         | OpenAI                    | Gemini                    |
| ----------------------------------- | ----------------- | ------------------------- | ------------------------- |
| Streaming (SSE)                     | ✓                 | ✓                         | ✓                         |
| Tool use / function calling         | ✓                 | ✓                         | ✓                         |
| **Thinking-trace inspection** (AIP) | ✓ <sup>\[1]</sup> | ⚠ Partial <sup>\[2]</sup> | ✓ <sup>\[3]</sup>         |
| Multimodal (image inputs)           | ✓                 | ✓                         | ✓                         |
| Prompt caching                      | ✓ <sup>\[4]</sup> | ⚠ Partial <sup>\[5]</sup> | ⚠ Partial <sup>\[6]</sup> |
| Batch API                           | ✓                 | ✓                         | ✓                         |

### \[1] Anthropic — full extended thinking

Anthropic models expose full **extended thinking blocks** through the response API. AIP reads completed thinking blocks post-response, pre-delivery, and the verifier (Claude Haiku 4.5) has full chain-of-thought visibility. This is the most complete AIP coverage Mnemom offers — and the baseline against which other providers are compared.

### \[2] OpenAI — reasoning summaries only

OpenAI's reasoning APIs (`o3`, `o3-mini`) expose **reasoning summaries**, not raw chain-of-thought. AIP can inspect these summaries, but the depth of analysis is bounded by what OpenAI chose to summarize. Non-reasoning models (`gpt-5`, `gpt-5-codex`, `gpt-4o`) expose no internal reasoning at all — AIP degrades to surface-only analysis on these.

**What this means in practice:**

* Boundary violations that surface in the model's final response are caught equally well across all providers.
* Boundary violations that would have surfaced in the model's hidden reasoning, but never reach the final response, are caught with **lower confidence** on OpenAI than on Anthropic or Gemini.
* The AIP integrity-checkpoint **verdict** is still emitted on OpenAI; the **certainty** of that verdict is provider-conditional.

This is the load-bearing honesty disclosure. Mnemom does not claim uniform AIP coverage across providers.

### \[3] Gemini — full `thoughts` exposure

Gemini 2.5 models expose a `thoughts` field on response candidates. Coverage is uniform across 2.5 Pro and 2.5 Flash; AIP reads `thoughts` through the gateway's response normalizer and treats it as equivalent to Anthropic extended thinking.

### \[4] Anthropic — explicit `cache_control`

Anthropic supports explicit `cache_control` block markers — customers control which prompt segments are cached. Mnemom passes `cache_control` through transparently. **Safe House still evaluates the full request** (it does not assume cached prefixes are safe just because they were previously seen). Cache hits do not bypass any checkpoint.

### \[5] OpenAI — automatic caching, no customer control

OpenAI's prompt caching is **automatic** — the API decides what to cache based on request shape. Customers cannot reason about cache hit rates the way they can on Anthropic. Mnemom passes requests through unchanged; cache decisions are OpenAI's. **Safe House dispatch remains idempotent across cache hits and misses** — the same prompt routed through Mnemom twice produces the same verdict regardless of whether OpenAI cached it.

### \[6] Gemini — separate `CachedContent` API

Gemini exposes prompt caching as a separate `CachedContent` resource (explicit cache lifecycle, named caches with TTL). The gateway today does not surface or use this API; requests are sent without referencing cached content. Customers using Gemini's cache outside Mnemom will see lower latency than they see through Mnemom — this is a known gap on our roadmap.

## AIP coverage by provider — the headline commitment

Of all per-provider gaps, **integrity-checkpoint coverage** is the load-bearing one. Mnemom's public SLO commitment is:

| Provider                                               | Target AIP coverage <sup>\[\*]</sup>                |
| ------------------------------------------------------ | --------------------------------------------------- |
| Anthropic (Opus 4.8, Opus 4.7, Sonnet 4.6, Haiku 4.5)  | **≥ 99%**                                           |
| Gemini (2.5 Pro, 2.5 Flash)                            | **≥ 95%**                                           |
| OpenAI o-series (`o3`, `o3-mini`)                      | **≥ 50%**                                           |
| OpenAI non-thinking (`gpt-5`, `gpt-5-codex`, `gpt-4o`) | Excluded — AIP runs in degraded "surface-only" mode |

<sup>\[\*]</sup> "AIP coverage" is defined as the percentage of customer-facing AIP analysis cycles where the verifier had full thinking-trace inspection. Anthropic and Gemini expose full traces; OpenAI o-series exposes reasoning summaries only; non-reasoning OpenAI models expose no internal reasoning. Coverage is measured on a rolling 30-day window.

**If your application relies on AIP catching boundary violations in the model's reasoning** — particularly violations that would not surface in the final response — choose Anthropic or Gemini. OpenAI o-series is supported, with the documented coverage limitation. OpenAI non-thinking models are supported for inference but are not the right choice when AIP is the load-bearing safety layer.

## Latency expectations

In aggregate:

* **Safe House dispatch** adds \~15 ms P50 / \~60 ms P95 across all providers (the dispatch path is provider-agnostic).
* **AIP analysis** runs post-response, pre-delivery. Cost varies by upstream-response token volume — Anthropic Opus with full extended thinking emits the largest traces and therefore the longest AIP analysis tails (P95 up to 2.5 seconds). Gemini 2.5 Flash and OpenAI non-thinking models emit thin traces and complete AIP analysis in P50 ≤ 800 ms.

Mid-stream interruption for integrity violations is not supported on any provider. AIP runs after the upstream response completes, but before the gateway delivers it to the customer.

## How we test against each provider

Mnemom's gateway adapter — the code that parses each provider's response format, extracts thinking blocks, and routes tool calls — is tested in **two layers**:

| Layer            | Cadence                 | Catches                                                                                              |
| ---------------- | ----------------------- | ---------------------------------------------------------------------------------------------------- |
| **Static-shape** | Every PR to the gateway | "Did our parser break?" Asserts the adapter handles captured response fixtures correctly.            |
| **Live**         | Nightly                 | "Did the upstream provider ship a breaking change?" Real upstream call → real response → real parse. |

All three providers (Anthropic, OpenAI, Gemini) run **both layers** as of 2026-05-12. Live tests fire nightly against real upstream APIs and detect breaking changes within 24 hours.

<Note>
  **Streaming OpenAI thinking visibility:** OpenAI's STREAMING Chat Completions API does not emit reasoning summaries via `delta.reasoning_content` for o-series models. Reasoning happens server-side and is reported in `usage.completion_tokens_details.reasoning_tokens`, but the reasoning text itself does not reach the streamed response. Customers using OpenAI's non-streaming Responses API see reasoning summaries; streaming customers do not.

  This is upstream behavior, not a Mnemom limitation. The AIP coverage commitment of **≥50% on OpenAI o-series** applies to non-streaming consumers; streaming OpenAI o-series degrades to surface-only treatment. Mnemom's gateway parser correctly reports empty thinking content for streaming OpenAI responses regardless of model.
</Note>

## Deprecation policy

Models the gateway routes are classified into two tiers:

<CardGroup cols={2}>
  <Card title="Supported" icon="check">
    Listed in the [supported models](#supported-models) section above. v1 promise applies. Safe House, AIP, CLPI, DLP all work to their per-provider commitment. Tested in CI. Deprecation requires **90 days' notice** via this page and the changelog.
  </Card>

  <Card title="Passthrough" icon="forward">
    Routed by the gateway but not in the supported tier. Inference works; Safe House features are best-effort. Not tested in CI. No deprecation notice — model availability tracks the provider's lifecycle.
  </Card>
</CardGroup>

**Today's deprecation schedule:**

| Model                            | Status      | Sunset date                       | Migration target                    |
| -------------------------------- | ----------- | --------------------------------- | ----------------------------------- |
| `claude-3-opus-20240229`         | Passthrough | Tracks Anthropic's deprecation    | `claude-opus-4-8`                   |
| `claude-3-5-sonnet-20241022`     | Passthrough | Tracks Anthropic's deprecation    | `claude-sonnet-4-6`                 |
| `claude-sonnet-4-20250514`       | Passthrough | 2026-Q3 (recommend migrating now) | `claude-sonnet-4-6`                 |
| `gpt-4o`                         | Passthrough | Tracks OpenAI's deprecation       | `gpt-5`                             |
| `gemini-3-pro`, `gemini-3-flash` | Preview     | When Google releases stable       | Stay on `gemini-3-*` once supported |

Passthrough-tier models that are removed from the upstream provider also disappear from the gateway's `/models.json` registry; we do not maintain shims.

## Out of scope

Provider expansion beyond Anthropic + OpenAI + Gemini is **not in scope for v1**. Cohere, Mistral, Together, Groq, and other providers are not supported. Adding a provider is a multi-quarter effort (Safe House dispatch, AIP adapter, CLPI policy schema mapping, test coverage, docs) — tracked separately.

BYOK (bring-your-own-key) for upstream providers is also out of v1. v1 ships with Mnemom-only key custody.

## Related

* [Integrity Checkpoints](/concepts/integrity-checkpoints) — the AIP analysis machinery
* [Safe House](/concepts/safe-house) — pre-screening layer for inbound messages
* [CLPI](/concepts/clpi) — Continuous Local Policy Interpretation for tool use
* [Webhook contract](/concepts/webhook-contract) — event delivery for operator surfaces (provider-agnostic)