GPT-5.3 Codex vs Magistral Medium
Compare OpenAI and Mistral AI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
GPT-5.3 Codex
Magistral Medium
Cost Differences
Magistral Medium costs less than GPT-5.3 Codex
Feature Comparison
| Feature | GPT-5.3 Codex | Magistral Medium |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Input Price | $1.75/1M tokens | $2.00/1M tokens |
| Output Price | $14.00/1M tokens | $5.00/1M tokens |
| Context Window | 256,000 tokens | 128,000 tokens |
| Max Output | 32,768 tokens | 32,768 tokens |
| Category | coding | reasoning |
| Capabilities | textcode | textreasoning |
| Release Date | 3/1/2026 | 12/15/2025 |
GPT-5.3 Codex vs Magistral Medium: Which Should You Choose?
Choosing between GPT-5.3 Codex and Magistral Medium depends on your priorities: cost efficiency, context length, or raw capability. Magistral Medium is the more affordable option at $2.00/1M input tokens. Meanwhile, GPT-5.3 Codex offers a significantly larger context window at 256,000 tokens vs 128,000 for Magistral Medium.
These models come from different providers — OpenAI and Mistral AI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with OpenAI, switching to Mistral AIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: GPT-5.3 Codex is a coding model while Magistral Medium is reasoning. This means they're optimized for different workloads. Magistral Medium targets more demanding workloads, while GPT-5.3 Codex provides a cost-effective option for everyday tasks.
Output costs matter too. GPT-5.3 Codex charges $14.00/1M output tokens vs $5.00 for Magistral Medium. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Magistral Medium has the edge here at $5.00/1M output tokens.
Best Use Cases
Choose GPT-5.3 Codex when:
- • Budget is a primary concern
- • You need a larger context window (256,000 tokens)
- • You're already using OpenAI's API ecosystem
Choose Magistral Medium when:
- • You're already using Mistral AI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5.3 Codex (OpenAI)
Magistral Medium (Mistral AI)
Start using GPT-5.3 Codex today
Sign Up for OpenAI →Start using Magistral Medium today
Sign Up for Mistral AI →