Devstral 2 vs GPT-5.5
Devstral 2 vs GPT-5.5: Devstral 2 is cheaper for input-heavy usage ($0.40/M vs $5.00/M input tokens), while GPT-5.5 is better for long-context tasks (1,050,000 tokens).
Direct answer: choose Devstral 2 for lower token spend and choose GPT-5.5 when your workload needs longer context.
Common pricing searches covered on this page: Devstral 2 vs GPT-5.5 • Devstral 2 vs GPT-5.5 pricing • Devstral 2 vs GPT-5.5 API pricing and devstral 2 vs 5 5 pricing.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Devstral 2
GPT-5.5
Cost Differences
GPT-5.5 costs more than Devstral 2
Quick Recommendation
Winner for direct API pricing: Devstral 2. At the default workload, Devstral 2 saves about $55.80/month ($678.90/year) versus GPT-5.5.
Feature Comparison
| Feature | Devstral 2 | GPT-5.5 |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Input Price | $0.40/1M tokens | $5.00/1M tokens |
| Output Price | $2.00/1M tokens | $30.00/1M tokens |
| Context Window | 262,144 tokens | 1,050,000 tokens |
| Max Output | 32,768 tokens | 128,000 tokens |
| Category | efficient | flagship |
| Capabilities | textcode | textvisioncodereasoning |
| Release Date | 12/9/2025 | 4/24/2026 |
Devstral 2 vs GPT-5.5: Which Should You Choose?
Choosing between Devstral 2 and GPT-5.5 depends on your priorities: cost efficiency, context length, or raw capability. Devstral 2 is the more affordable option at $0.40/1M input tokens — 92% cheaper than GPT-5.5. Meanwhile, GPT-5.5 offers a significantly larger context window at 1,050,000 tokens vs 262,144 for Devstral 2.
These models come from different providers — Mistral AI and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Mistral AI, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Devstral 2 is a efficient model while GPT-5.5 is flagship. This means they're optimized for different workloads. GPT-5.5 targets more demanding workloads, while Devstral 2 provides a cost-effective option for everyday tasks.
Output costs matter too. Devstral 2 charges $2.00/1M output tokens vs $30.00 for GPT-5.5. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Devstral 2 has the edge here at $2.00/1M output tokens.
Multimodal capabilities: GPT-5.5 supports vision (image inputs) while Devstral 2 is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Devstral 2 when:
- • Budget is a primary concern
- • You're already using Mistral AI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Choose GPT-5.5 when:
- • You need a larger context window (1,050,000 tokens)
- • You need more capabilities (vision, reasoning)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Devstral 2
- • Input pricing: $0.40/M tokens
- • Output pricing: $2.00/M tokens
- • Context window: 262,144 tokens
- • Max output: 32,768 tokens
Watch out for
- • Smaller context window than GPT-5.5
GPT-5.5
- • Input pricing: $5.00/M tokens
- • Output pricing: $30.00/M tokens
- • Context window: 1,050,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Higher input cost than Devstral 2
- • Higher output cost than Devstral 2
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Devstral 2 (Mistral AI)
GPT-5.5 (OpenAI)
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Devstral 2 or GPT-5.5?▼
What is the context window difference between Devstral 2 and GPT-5.5?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Mistral AI and OpenAI API pricing beyond this model matchup?▼
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