GPT-5.5 vs Mistral Medium 3

GPT-5.5 vs Mistral Medium 3: Mistral Medium 3 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 Mistral Medium 3 for lower token spend and choose GPT-5.5 when your workload needs longer context.

Common pricing searches covered on this page: GPT-5.5 vs Mistral Medium 3 • GPT-5.5 vs Mistral Medium 3 pricing • GPT-5.5 vs Mistral Medium 3 API pricing and 5 5 vs medium 3 pricing.

OpenAI

GPT-5.5

Mistral AI

Mistral Medium 3

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GPT-5.5 pricing page Mistral Medium 3 pricing page OpenAI provider overview Mistral AI provider overview

Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

GPT-5.5

Per Request:$0.02

Daily:$2.00

Monthly:$60.00

Yearly:$730.00

Mistral Medium 3

Per Request:$0.001400

Daily:$0.14

Monthly:$4.20

Yearly:$51.10

Cost Differences

$0.0186

Per Request

$1.86

Daily

$55.80

Monthly

$678.90

Yearly

Mistral Medium 3 costs less than GPT-5.5

Quick Recommendation

Winner for direct API pricing: Mistral Medium 3. At the default workload, Mistral Medium 3 saves about $55.80/month ($678.90/year) versus GPT-5.5.

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Feature Comparison

Feature	GPT-5.5	Mistral Medium 3
Provider	OpenAI	Mistral AI
Input Price	$5.00/1M tokens	$0.40/1M tokens
Output Price	$30.00/1M tokens	$2.00/1M tokens
Context Window	1,050,000 tokens	128,000 tokens
Max Output	128,000 tokens	16,384 tokens
Category	flagship	balanced
Capabilities	textvisioncodereasoning	textcode
Release Date	4/24/2026	5/7/2025

GPT-5.5 vs Mistral Medium 3: Which Should You Choose?

Choosing between GPT-5.5 and Mistral Medium 3 depends on your priorities: cost efficiency, context length, or raw capability. Mistral Medium 3 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 128,000 for Mistral Medium 3.

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-5.5 is a flagship model while Mistral Medium 3 is balanced. This means they're optimized for different workloads. GPT-5.5 is built for complex tasks that require deeper reasoning, while Mistral Medium 3 offers better value for routine operations.

Output costs matter too. GPT-5.5 charges $30.00/1M output tokens vs $2.00 for Mistral Medium 3. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Mistral Medium 3 has the edge here at $2.00/1M output tokens.

Multimodal capabilities: GPT-5.5 supports vision (image inputs) while Mistral Medium 3 is text-only. If your application needs image understanding, this narrows your choice.

Best Use Cases

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

Choose Mistral Medium 3 when:

• Budget is a primary concern
• You're already using Mistral AI's API ecosystem

Pros and Caveats at a Glance

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 Mistral Medium 3
• Higher output cost than Mistral Medium 3

Mistral Medium 3

• Input pricing: $0.40/M tokens
• Output pricing: $2.00/M tokens
• Context window: 128,000 tokens
• Max output: 16,384 tokens

Watch out for

• Smaller context window than GPT-5.5

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

GPT-5.5 (OpenAI)

Cost Calculator

Provider

Model

Input Tokens

Output Tokens

Requests/Day

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Mistral Medium 3 (Mistral AI)

Cost Calculator

Provider

Model

Input Tokens

Output Tokens

Requests/Day

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Frequently Asked Questions

Which is cheaper, GPT-5.5 or Mistral Medium 3?▼

Mistral Medium 3 is cheaper for input tokens at $0.40 per million tokens vs $5.00 for GPT-5.5 — that's 92% savings on input costs.

What is the context window difference between GPT-5.5 and Mistral Medium 3?▼

GPT-5.5 supports 1,050,000 tokens while Mistral Medium 3 supports 128,000 tokens — a difference of 922,000 tokens in favor of GPT-5.5.

Which model is better for AI Chatbot?▼

Both models support text. For ai chatbot, Mistral Medium 3 is the lower-cost option, while GPT-5.5 offers a larger context window (1,050,000 vs 128,000 tokens). Choose Mistral Medium 3 for budget sensitivity or GPT-5.5 for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, GPT-5.5 costs about $60.00/month and Mistral Medium 3 costs about $4.20/month. Overall, Mistral Medium 3 has lower combined input + output rates ($0.40 in, $2.00 out) vs GPT-5.5.

Where can I compare OpenAI and Mistral AI API pricing beyond this model matchup?▼

See the OpenAI vs Mistral AI provider comparison page for lineup-level averages, then review each model page for exact per-token rates.