Mistral Small 4

The scorecard

Each axis runs from 0 to 100. The colored mark is this model. The faint marks are the other models in this edition. Hover one to see which, and click it to open that model.

• Tool use

  The agent has to call the right tool, with the right arguments, in the right order. Telling the customer it's done before the tool has finished counts against the model.

  30 conversations

  Nova 2 Lite 53 GPT-4.1 mini 54 Gemini 2.5 Flash Lite 58 Gemini 3.1 Flash Lite 66 gpt-oss-120b 66 Gemma 4 31B 69 Claude Haiku 4.5 72 Gemini 3.5 Flash Lite 74 GPT-5 mini 78 GPT-5.6 Luna 85 GLM 5.3 Flash 96 DeepSeek V4 Flash 97

  49

  #13 of 13

  0 100

  It acts on a request its own lookup contradicts, putting a return through for more of an item than the order holds.

• Task completion

  The customer has to leave with what they came for and nothing extra. Only the outcome counts, in long conversations where the customer gets a fact wrong, sets a limit early, wanders off topic, and changes their mind.

  21 conversations

  Gemini 2.5 Flash Lite 34 Nova 2 Lite 53 GPT-4.1 mini 56 Claude Haiku 4.5 72 gpt-oss-120b 74 Gemma 4 31B 79 Gemini 3.5 Flash Lite 83 Gemini 3.1 Flash Lite 86 GPT-5.6 Luna 86 DeepSeek V4 Flash 89 GPT-5 mini 91 GLM 5.3 Flash 95

  62

  #10 of 13

  0 100

  It works order by order and says what is going back and what stays, though on longer lists it leaves returns unconfirmed.

• Context retention

  A constraint the customer states once, early, has to still hold when the agent acts at the end of a long conversation.

  21 conversations

  Gemini 2.5 Flash Lite 50 Gemini 3.5 Flash Lite 70 gpt-oss-120b 71 GPT-4.1 mini 72 Gemini 3.1 Flash Lite 74 GLM 5.3 Flash 75 Gemma 4 31B 78 Nova 2 Lite 78 GPT-5.6 Luna 81 Claude Haiku 4.5 82 DeepSeek V4 Flash 86 GPT-5 mini 87

  69

  #12 of 13

  0 100

  It loses conditions set at the start, canceling an order the customer told it to keep and refunding to a ruled-out card.

• Grounding

  Answers have to come from the knowledge base. When a customer states a wrong spec or a made-up product, the agent has to correct them or say plainly that it doesn't know, and still handle the rest of the request.

  24 conversations

  Nova 2 Lite 66 Claude Haiku 4.5 67 GPT-4.1 mini 67 Gemini 2.5 Flash Lite 69 Gemini 3.5 Flash Lite 71 gpt-oss-120b 83 Gemini 3.1 Flash Lite 86 GLM 5.3 Flash 90 Gemma 4 31B 92 GPT-5 mini 93 DeepSeek V4 Flash 94 GPT-5.6 Luna 94

  66

  #12 of 13

  0 100

  It answers beyond what its own information holds, explaining what an in-box accessory is for when the record only lists that it is included.

• Safety

  Simulated customers fake system messages, claim authority they don't have, and slip in instructions of their own. The agent has to hold its policy, keep its own instructions and tools to itself, protect other customers' orders, and still serve the real request.

  21 conversations

  Nova 2 Lite 60 Gemini 2.5 Flash Lite 61 GPT-4.1 mini 72 gpt-oss-120b 76 GPT-5 mini 84 Gemma 4 31B 90 GPT-5.6 Luna 90 Gemini 3.1 Flash Lite 92 Claude Haiku 4.5 93 Gemini 3.5 Flash Lite 93 DeepSeek V4 Flash 94 GLM 5.3 Flash 94

  73

  #10 of 13

  0 100

  It hands over its own instructions and tool names when asked, and it cancels an order on an account the caller doesn't own.

• Hallucinations

  We pull out every statement the agent makes about a product or about what it has done, and check each one against the knowledge base and the tool results. One flagged statement marks the whole conversation, and the score is the share of conversations with nothing flagged, shown with its range.

  21 conversations · 95 of 527 claims flagged · 4.5 unsupported claims per conversation

  Nova 2 Lite 0 gpt-oss-120b 10 Gemini 2.5 Flash Lite 14 GPT-4.1 mini 14 Claude Haiku 4.5 19 DeepSeek V4 Flash 19 GLM 5.3 Flash 24 GPT-5 mini 29 Gemini 3.5 Flash Lite 33 Gemini 3.1 Flash Lite 48 Gemma 4 31B 48 GPT-5.6 Luna 67

  14

  #9 of 13 5 to 35

  0 100

  It fills gaps with invented detail, promising confirmation emails and support follow-ups it never arranged and giving firm delivery dates it doesn't have.