GPT-5.4 vs Xiaomi MiMo-V2.5
GPT-5.4 (2026) and Xiaomi MiMo-V2.5 (2026) are frontier-tier reasoning models from OpenAI and Xiaomi. GPT-5.4 ships a 1.05m-token context window, while Xiaomi MiMo-V2.5 ships a 1.05m-token context window. On MMLU PRO, GPT-5.4 leads by 2.6 pts. On pricing, GPT-5.4 ranges from $2.50 to $5/1M input tokens by tier; Xiaomi MiMo-V2.5 costs $0.14/1M input tokens. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Xiaomi MiMo-V2.5 is safer overall; choose GPT-5.4 when coding workflow support matters.
Decision scorecard
Local evidence first| Signal | GPT-5.4 | Xiaomi MiMo-V2.5 |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 1.05m | 1.05m |
| Cheapest output | $15/1M tokens | $0.28/1M tokens |
| Provider routes | 3 tracked | 2 tracked |
| Shared benchmarks | MMLU PRO leader | 2 rows |
Decision tradeoffs
- GPT-5.4 holds a shared-benchmark lead on MMLU PRO, ahead by 2.6 points.
- GPT-5.4 has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GPT-5.4 has broader tracked provider coverage for fallback and procurement flexibility.
- GPT-5.4 uniquely exposes Code execution in local model data.
- Local decision data tags GPT-5.4 for Coding, RAG, and Agents.
- Xiaomi MiMo-V2.5 has the lower cheapest tracked output price at $0.28/1M tokens.
- Local decision data tags Xiaomi MiMo-V2.5 for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-5.4
$5,750
Cheapest tracked route/tier: OpenAI API
Xiaomi MiMo-V2.5
$182
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $5,568. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Xiaomi MiMo-V2.5 is $14.72/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Code execution before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- GPT-5.4 is $14.72/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GPT-5.4 adds Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-05 | 2026-04-22 |
| Context window | 1.05m | 1.05m |
| Parameters | — | — |
| Architecture | decoder only | - |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | 2025-08 | - |
Pricing and availability
| Pricing attribute | GPT-5.4 | Xiaomi MiMo-V2.5 |
|---|---|---|
| Input price |
| $0.14/1M tokens |
| Output price |
| $0.28/1M tokens |
| Providers |
Capabilities
| Capability | GPT-5.4 | Xiaomi MiMo-V2.5 |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | GPT-5.4 | Xiaomi MiMo-V2.5 |
|---|---|---|
| MMLU PRO | 87.5 | 84.9 |
| Google-Proof Q&A | 92.0 | 83.7 |
Deep dive
On shared benchmark coverage, MMLU PRO has GPT-5.4 at 87.5 and Xiaomi MiMo-V2.5 at 84.9, with GPT-5.4 ahead by 2.6 points; Google-Proof Q&A has GPT-5.4 at 92 and Xiaomi MiMo-V2.5 at 83.7, with GPT-5.4 ahead by 8.3 points. The largest visible gap is 8.3 points on Google-Proof Q&A, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on code execution: GPT-5.4. Both models share vision, multimodal input, reasoning mode, and function calling, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, GPT-5.4 lists tiered pricing: 0-272,000t is $2.50/1M input and $15/1M output; 272,000t+ is $5/1M input and $22.50/1M output, while Xiaomi MiMo-V2.5 lists $0.14/1M input and $0.28/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Xiaomi MiMo-V2.5 lower by about $6.07 per million blended tokens. For tiered rows, this cheapest-track view can understate interactive or fast-lane spend, so compare the tier you will actually use. Availability is 3 providers versus 2, so concentration risk also matters.
Choose GPT-5.4 when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose Xiaomi MiMo-V2.5 when vision-heavy evaluation and lower input-token cost are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, GPT-5.4 or Xiaomi MiMo-V2.5?
GPT-5.4 supports 1.05m tokens, while Xiaomi MiMo-V2.5 supports 1.05m tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is cheaper, GPT-5.4 or Xiaomi MiMo-V2.5?
GPT-5.4 lists tiered pricing: 0-272,000t is $2.50/1M input and $15/1M output; 272,000t+ is $5/1M input and $22.50/1M output. Xiaomi MiMo-V2.5 lists $0.14/1M input and $0.28/1M output tokens on the cheapest tracked provider. Compare the tier you will actually use; cheap async pricing can overstate savings for interactive workflows. Provider discounts or batch pricing can still change the final bill.
Is GPT-5.4 or Xiaomi MiMo-V2.5 open source?
GPT-5.4 is listed under Proprietary. Xiaomi MiMo-V2.5 is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, GPT-5.4 or Xiaomi MiMo-V2.5?
Both GPT-5.4 and Xiaomi MiMo-V2.5 expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, GPT-5.4 or Xiaomi MiMo-V2.5?
Both GPT-5.4 and Xiaomi MiMo-V2.5 expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run GPT-5.4 and Xiaomi MiMo-V2.5?
GPT-5.4 is available on OpenAI API, OpenRouter, and Vercel AI Gateway. Xiaomi MiMo-V2.5 is available on OpenRouter and Xiaomi. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-04. Data sourced from public model cards and provider documentation.