Head to head · LLM inference · October 2026 research run
Azure OpenAI in Foundry Models vs Gemini 4 Carbon
Azure OpenAI in Foundry Models scores 80 (A) on agent readiness against Gemini 4 Carbon's 62.6 (B), and leads in 6 of 7 scored categories. Both do llm inference.
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Which one, for what
Azure OpenAI in Foundry Models A
Best for Teams on Azure that need OpenAI models with Entra ID, private networking, EU or US data zones or FedRAMP scope, and one resource that also serves DeepSeek, Llama, Mistral and Grok models.
Ahead on
- Reliability, 80 against 40
- Agent ergonomics, 98 against 93
- Security & auth, 95 against 55
- Transparency & trust, 83 against 72
Also in its favour
- Agent-ready, a grade of BB or better
Watch for
Intermittent failures and 5xx errors in Sweden Central for about six hours on 29 September 2026
Best for Agents on the hardest long tasks (multi-step debugging, large codebases, open-ended research, security work) that can pay frontier prices and already use the Gemini API.
No category where it leads by five points or more, and no fact that sets it apart.
Watch for
Paid tier only, with no free tier to try it on
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Reliability Azure OpenAI in Foundry Models +40
Azure OpenAI in Foundry Models 80
Azure status page with post-incident reviews, listing Azure OpenAI Service, Foundry Models and Foundry Agent Service as components (20). One incident in the 90 days to 6 November 2026 names Azure OpenAI, and no review after it does, intermittent request failures, higher latency and HTTP 5xx errors in Sweden Central from 10:03 to 15:58 UTC on 29 September 2026 (tracking 7QL5-Z50), counted as one major outage as in the Foundry fine-tuning dossier. The 23 July West US review and the 30 September gateway incident don't name it (10). Quota tiers from Free to Tier 6 with TPM and RPM per model and deployment type, 1,000 RPM and 1,000,000 TPM for each GPT-6 model on Global Standard at Tier 1 (15). 429 responses carry retry-after-ms, every response carries x-ratelimit-* headers, and the quota guide gives exponential backoff with jitter and SDK retry settings (15). The models page says models sold by Azure are covered by Azure service-level agreements and links the Online Services SLA. The consolidated SLA document wouldn't download on 6 October and wasn't retried on 6 November, so the clause rests on Microsoft's docs, read the same way as the 5 October Azure Speech check (10). The v1 API is GA and the GPT-6 models carry no preview label (10).
Gemini 4 Carbon 40
Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Status page at aistudio.google.com/status with no readable components or history (10 of 20) and no readable incident record (5 of 30). Rate-limit tiers and spend limits published, per-model limits in AI Studio (5 of 15). Backoff guidance for 429 and 503 and SDK retries (15). No SLA (0). Carbon's launch stage isn't stated in Google's developer post, the Antigravity post or the Cloud developer guide read on 10 November, and the model ID carries no preview label, so half (5 of 10, a judgement call; Argon's GA earned the platform 10). 10 + 5 + 5 + 15 + 0 + 5 = 40.
Security & auth Azure OpenAI in Foundry Models +40
Azure OpenAI in Foundry Models 95
Model reading. Microsoft Entra ID tokens with Azure roles (the Cognitive Services OpenAI User role for calls), managed identities, and key authentication that can be disabled per resource, or two regenerable resource keys in the api-key header. No documented route puts the key in a URL query string (30). Prompts, completions, embeddings and training data aren't used to train foundation models without the customer's permission or instruction, per the data privacy page updated 4 August 2026 (20). Flagged prompts and completions may be stored in the customer's geography for human abuse review, with no retention period stated, and approved customers can turn that storage off through modified abuse monitoring. Responses API data is kept 30 days by default unless store is false (12 of 15). Azure Monitor resource logs and the subscription activity log, as read in the Foundry fine-tuning dossier (15). MSRC coordinated disclosure policy and Microsoft's bounty programme, both named in microsoft.com's security.txt, and Azure OpenAI is listed in FedRAMP High and DoD IL2 scope in Azure public regions. The security.txt passed its Expires date on 2026-09-23 and was still expired on 6 November, which the Bedrock and S3 dossiers mark down by 2, applied here too (18 of 20, down from 20 on 6 October for consistency).
Gemini 4 Carbon 55
Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Keys bound to a service account and restricted to the Gemini API, with no scopes and a token accepted in the URL (15 of 30, the platform's deduction). Carbon is on the paid tier only, and Google's terms say paid-tier content isn't used to improve products; AI Studio use under a Google AI Ultra subscription falls under terms we didn't read, so 15 of 20 (a judgement call; the platform's 10 is for its free tier). Abuse retention with no number, and new paid projects store requests by default since 26 October (5 of 15). Request logs for billed projects (15). security.txt and a reward programme, no certification naming the API (5 of 20). 15 + 15 + 5 + 15 + 5 = 55.
Transparency & trust Azure OpenAI in Foundry Models +11
Azure OpenAI in Foundry Models 83
Closed service under the Microsoft Product Terms, with the v1 spec under MIT and the OpenAI SDKs under Apache-2.0 (15). The data privacy page agrees with the product terms on no training and states where data is processed and stored by deployment type, but gives no retention period for the human-review store and sits beside a 30-day default for Responses data (24 of 30). A published lifecycle policy and a retirement schedule with dates and replacements, but on 6 November the schedule listed gpt-realtime-mini 2025-10-06 and 2025-12-15 twice each with different retirement dates, and no GPT-6 model yet (18 of 20, down from 20). Data locations stated for Standard, Data Zone and Global deployments, and a public sub-processor list per the 5 October Azure Speech check, not re-read (20).
Gemini 4 Carbon 72
Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Closed service with clear terms, SDKs Apache-2.0 (15). Paid-tier data isn't used, abuse retention has no number, and request storage is on by default for new paid projects (20 of 30). Deprecations table (15 of 20). Data may be cached anywhere Google has facilities; no subprocessor list checked (5 of 20). Every benchmark figure is Google's own. 15 + 20 + 15 + 5 = 55.
Agent ergonomics Azure OpenAI in Foundry Models +5
Azure OpenAI in Foundry Models 98
Model reading of the checklist (tool use, structured output, caching, context, batch, SDKs, errors). Tool use with parallel calls and a forced call by naming the function in tool_choice, 18 of 20 because gpt-6.1-sol calls tools only through the Responses API (18). Strict structured outputs (15). Prompt caching from 1,024 tokens, cached input at 0.1x on GPT-6 ($1 per million on Astra) and cache writes at 1.25x from GPT-5.6 on, with explicit breakpoints (15). 1,050,000-token context on GPT-6 and GPT-6.1, input capped at 922,000 (15). Batch at 50% off Global Standard with a 24-hour target (10). The docs use OpenAI's own SDKs for Python, JavaScript, C#, Go and Java against the v1 endpoint (10). 429 and quota errors documented with retry headers (15). Calls name a deployment rather than a model, so each model must be deployed in the resource first, which the model checklist doesn't score.
Gemini 4 Carbon 93
Model reading for gemini-4-carbon on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Function calling, with forced calls by FunctionCallingConfig on the API (20). Structured output (13 of 15). Implicit caching with durable caching on by default, cached input 95% off, explicit caches not supported, per the Cloud guide read on 10 November (15). 1,048,576 tokens shared between input and output (15). Batch at half price on the platform (10). Python and JavaScript SDKs (10). Error codes with backoff guidance (10 of 15). 20 + 13 + 15 + 15 + 10 + 10 + 10 = 93.
Score by category
| Category | Weight this run | Azure OpenAI in Foundry Models | Gemini 4 Carbon | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 80 | 40 | Azure OpenAI in Foundry Models +40 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 87 | 85 | Azure OpenAI in Foundry Models +2 |
| Agent ergonomics | 13%16.2 | 98 | 93 | Azure OpenAI in Foundry Models +5 |
| Security & auth | 14%17.5 | 95 | 55 | Azure OpenAI in Foundry Models +40 |
| Payments & pricing | 10%12.5 | 20 | 20 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 86 | 83 | Azure OpenAI in Foundry Models +3 |
| Transparency & trust | 7%8.8 | 83 | 72 | Azure OpenAI in Foundry Models +11 |
| Negative events | ≤15 | 0 | 0 | |
| Total | A 80/100 | B 62.6/100 |
Facts side by side
| Fact | Azure OpenAI in Foundry Models | Gemini 4 Carbon |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | Microsoft | |
| Hosted endpoint | https://<resource>.openai.azure.com/openai/v1 | https://generativelanguage.googleapis.com/v1beta |
| Transports | HTTP | |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Proprietary service under the Microsoft Product Terms. The v1 OpenAPI spec is MIT, and the OpenAI SDKs the docs use are Apache-2.0 | Closed model, used through the Gemini API and Google's apps under Google's terms |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-10-26 | 2026-11-10 |
| Terms last updated | no date given | 2026-04-28 |
| Privacy policy last updated | 2026-09-01 | 2026-10-01 |
| Customer content may train models | yes | yes |
| Terms restrict automated access | yes | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 454k npm/wk | none |
Verdicts
Azure OpenAI in Foundry Models
An OpenAI-compatible v1 API with a public OpenAPI spec, Entra ID roles in place of shared keys and FedRAMP High scope, with GPT-6 and GPT-6.1 at OpenAI's list prices on Global Standard. Access needs an Azure subscription with a card and a deployment per model, and a 29 September 2026 incident caused about six hours of failures in Sweden Central.
Gemini 4 Carbon
Google's strongest model on the same Gemini API as Argon, with a 1M-token budget, function calling and structured output, at an introductory $2 and $10 per million tokens. Paid tier only, sampling parameters are ignored or refused, its launch stage isn't stated, and the price rises to $4 and $20 at a date Google hasn't given.
Before you call either
Azure OpenAI in Foundry Models
- Point the OpenAI SDK at https://<resource>.openai.azure.com/openai/v1/ and pass the deployment name as
model, not the model id - Prefer Entra ID with the Cognitive Services OpenAI User role over the resource key, which opens the whole data plane
- On 429 wait for
retry-after-ms, then back off with jitter. The OpenAI SDK retries twice by default - Set
store: falseon Responses calls you don't need kept. Stored responses persist 30 days by default - Keep remote MCP approvals on for servers you don't control. They're required by default
Gemini 4 Carbon
- Call generateContent at https://generativelanguage.googleapis.com/v1beta with model gemini-4-carbon and an x-goog-api-key on a billed project
- Set thinking_level (LOW, MEDIUM or HIGH) instead of thinking_budget, and don't send temperature, top_p or top_k
- Count output against the same 1,048,576-token limit as the input, and set max_output_tokens for long answers
- Put static prompt content first so implicit caching applies; explicit caches aren't supported
- Use gemini-4-argon for most coding and knowledge work, and Carbon for the hardest long tasks, as Google suggests
Questions
Which is better for AI agents, Azure OpenAI in Foundry Models or Gemini 4 Carbon?
Azure OpenAI in Foundry Models scores 80 (A) on agent readiness against Gemini 4 Carbon's 62.6 (B), and leads in 6 of 7 scored categories.
Do Azure OpenAI in Foundry Models and Gemini 4 Carbon need an API key?
Azure OpenAI in Foundry Models takes an API key or an OAuth sign-in. Gemini 4 Carbon needs an API key.
Can an agent call Azure OpenAI in Foundry Models and Gemini 4 Carbon without installing anything?
Yes. Azure OpenAI in Foundry Models has a hosted endpoint at https://<resource>.openai.azure.com/openai/v1 and Gemini 4 Carbon at https://generativelanguage.googleapis.com/v1beta.
Other comparisons with Azure OpenAI in Foundry Models or Gemini 4 Carbon
- Amazon Bedrock vs Azure OpenAI in Foundry Models
- Amazon Bedrock vs Gemini 4 Carbon
- Claude API vs Azure OpenAI in Foundry Models
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- Antseed vs Azure OpenAI in Foundry Models
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- Azure OpenAI in Foundry Models vs BlockRun.AI
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- Azure OpenAI in Foundry Models vs Gemini Developer API
- Azure OpenAI in Foundry Models vs GroqCloud
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- Azure OpenAI in Foundry Models vs Muse Ember
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- Azure OpenAI in Foundry Models vs Nemotron 3.5 Super VL
- Azure OpenAI in Foundry Models vs Novita AI
- Azure OpenAI in Foundry Models vs OpenAI API
- Azure OpenAI in Foundry Models vs OpenRouter
- Azure OpenAI in Foundry Models vs Prism Inference
- Azure OpenAI in Foundry Models vs Router.com (Ramp Router)
- Azure OpenAI in Foundry Models vs Beam 1.0
- Azure OpenAI in Foundry Models vs RouterPlus
- Azure OpenAI in Foundry Models vs SambaCloud
- Azure OpenAI in Foundry Models vs SiliconFlow
- Azure OpenAI in Foundry Models vs Simplismart
- Azure OpenAI in Foundry Models vs StepFun API
- Azure OpenAI in Foundry Models vs SWE-2 Flash
- Azure OpenAI in Foundry Models vs Tencent Cloud TokenHub
- Azure OpenAI in Foundry Models vs Together AI Inference
- Azure OpenAI in Foundry Models vs Vercel AI Gateway
- Azure OpenAI in Foundry Models vs Vertex AI (Gemini Enterprise Agent Platform)
- Azure OpenAI in Foundry Models vs xAI API (Grok)
- BlockRun.AI vs Gemini 4 Carbon
- Cerebras Inference vs Gemini 4 Carbon
- Claude Fable 5.2 vs Gemini 4 Carbon
- Claude Mythos 5.2 vs Gemini 4 Carbon
- Cloudflare AI Gateway vs Gemini 4 Carbon
- Cloudflare Workers AI vs Gemini 4 Carbon
- Cohere Chat API (Command models) vs Gemini 4 Carbon
- DeepInfra vs Gemini 4 Carbon
- DeepSeek API vs Gemini 4 Carbon
- Eden AI vs Gemini 4 Carbon
- Glimpse vs Gemini 4 Carbon
- Fireworks AI Inference vs Gemini 4 Carbon
- Gemini 4 Carbon vs Gemini Developer API
- Gemini 4 Carbon vs GroqCloud
- Gemini 4 Carbon vs Hugging Face Inference Providers
- Gemini 4 Carbon vs Inkling 2 Small
- Gemini 4 Carbon vs Jais 3
- Gemini 4 Carbon vs Meta Model API
- Gemini 4 Carbon vs MiniMax API
- Gemini 4 Carbon vs Mistral AI API
- Gemini 4 Carbon vs Muse Ember
- Gemini 4 Carbon vs Muse Spark Open
- Gemini 4 Carbon vs Nemotron 3.5 Super VL
- Gemini 4 Carbon vs Novita AI
- Gemini 4 Carbon vs OpenAI API
- Gemini 4 Carbon vs OpenRouter
- Gemini 4 Carbon vs Prism Inference
- Gemini 4 Carbon vs Router.com (Ramp Router)
- Gemini 4 Carbon vs Beam 1.0
- Gemini 4 Carbon vs RouterPlus
- Gemini 4 Carbon vs SambaCloud
- Gemini 4 Carbon vs SiliconFlow
- Gemini 4 Carbon vs Simplismart
- Gemini 4 Carbon vs StepFun API
- Gemini 4 Carbon vs SWE-2 Flash
- Gemini 4 Carbon vs Tencent Cloud TokenHub
- Gemini 4 Carbon vs Together AI Inference
- Gemini 4 Carbon vs Vercel AI Gateway
- Gemini 4 Carbon vs Vertex AI (Gemini Enterprise Agent Platform)
- Gemini 4 Carbon vs xAI API (Grok)
Machine-readable
- This page as Markdown
/compare/azure-openai-vs-gemini-4-carbon.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/azure-openai.json·/api/v1/tools/gemini-4-carbon.json - From a terminal
anchor compare azure-openai gemini-4-carbon(the CLI) - Over MCP
compare_tools {"a": "azure-openai", "b": "gemini-4-carbon"}at/mcp, no key