Devstral 2 vs Codestral vs GPT-5.3 Codex
Last updated: July 2026 | Pricing verified: July 2026
For coding agents, pricing is not just input plus output. You also pay for retries, tool calls, file context, failed patches, and long explanations. That is why the cheapest coding model is not always the best buy.
In July 2026, GPT-5.3 Codex costs $1.75/M input and $14/M output. Mistral lists Devstral 2 at $0.40/M input and $2/M output, Devstral Small 2 at $0.10/M and $0.30/M, and Codestral 25.08 at $0.30/M and $0.90/M.
Search Intent Notes
| Question | Practical answer |
|---|---|
| Main intent | Pick a coding model without burning API budget |
| Strongest reason not to choose Codex | Output pricing is high |
| Sensible tier for India | Codestral or Devstral Small 2 for volume; Codex for harder patches |
| Hidden limitation | Coding agents generate expensive output logs |
| Verdict | Use a router: cheap Mistral for routine edits, Codex for difficult work |
Pricing in INR
At $1 = ā¹95.21:
| Model | Input | Output | Approx input INR | Approx output INR |
|---|---|---|---|---|
| Devstral Small 2 | $0.10/M | $0.30/M | ā¹10 | ā¹29 |
| Codestral 25.08 | $0.30/M | $0.90/M | ā¹29 | ā¹86 |
| Devstral 2 | $0.40/M | $2.00/M | ā¹38 | ā¹190 |
| GPT-5.3 Codex | $1.75/M | $14.00/M | ā¹167 | ā¹1,333 |
Codex output is the painful part. A coding agent that explains every change can spend more on narration than code.
Category Winners
| Category | Winner |
|---|---|
| Cheapest coding model | Devstral Small 2 |
| Best budget code completion | Codestral 25.08 |
| Best Mistral agent model | Devstral 2 |
| Best OpenAI ecosystem fit | GPT-5.3 Codex |
| Best Indian startup setup | Codestral or Devstral first, Codex fallback |
aiml.site Human Score
| Metric | Devstral 2 | Codestral | GPT-5.3 Codex |
|---|---|---|---|
| Ease of Use | 7/10 | 8/10 | 9/10 |
| Value for Money | 9/10 | 9/10 | 6/10 |
| India Friendly | 6/10 | 6/10 | 5/10 |
| Dev Friendly | 8/10 | 8/10 | 10/10 |
| Free Tier Worth It? | 4/10 | 4/10 | 2/10 |
Who Should Use What?
Students
Use Codestral or Devstral Small 2 if you are experimenting with code generation through an API. Do not start with Codex unless you have free credits or a clear project budget.
Developers
Use GPT-5.3 Codex when the model has to understand a messy repo, run tool-heavy loops, or produce reliable patches. Use Codestral for autocomplete-style work and smaller functions.
Startups
Use a two-step system:
- Devstral/Codestral for routine edits
- Codex for escalations
- output caps on every request
- no verbose explanations unless the user asks
That last point saves real money.
Hidden Limitation
Most coding comparisons ignore output verbosity. A model that returns a 200-line explanation after a 10-line change can be expensive in production. Force short diffs, JSON summaries, or patch-only responses when possible.
Pros and Cons
Mistral Devstral/Codestral
Pros
- Much cheaper than Codex
- Good fit for repetitive coding tasks
- Clear pricing ladder
Cons
- Less OpenAI ecosystem support
- May need more retry logic
- Payment flow can be less India-friendly
GPT-5.3 Codex
Pros
- Strong OpenAI developer tooling
- Better for agentic workflows
- Easier integration with Codex products
Cons
- Expensive output tokens
- Not ideal for student-budget API experiments
- USD billing can be annoying from India
Final Verdict
For Indian developers, GPT-5.3 Codex is the premium coding fallback, not the default worker. Use Devstral or Codestral for cheap repeated work. Send only hard repo-level tasks to Codex.
Why Trust This Review?
Pricing was verified on July 6, 2026 from OpenAI and Mistral pricing pages. INR uses Frankfurter's USD rate. We compared cost structure for coding-agent workflows, not fake benchmark rankings.
FAQ
Is GPT-5.3 Codex expensive?
Yes. It costs $1.75/M input and $14/M output, roughly ā¹167/M input and ā¹1,333/M output.
Is Devstral 2 cheaper than Codex?
Yes. Devstral 2 is $0.40/M input and $2/M output, much cheaper than GPT-5.3 Codex.
Which is best for Indian students?
Codestral or Devstral Small 2. They are much cheaper for learning and experiments.
Which is best for production coding agents?
Use a router. Start with Devstral/Codestral, escalate hard tasks to GPT-5.3 Codex.
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