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Claude Haiku 4.5 vs GPT-5.6 Terra — Price, Context, and Capability Compared

Verdict

GPT-5.6 Terra costs 2.3× more per blended million tokens than Claude Haiku 4.5. GPT-5.6 Terra has the larger context window (400,000 tokens). Default to Claude Haiku 4.5 unless you specifically need GPT-5.6 Terra's edge. Only GPT-5.6 Terra exposes an extended-thinking mode.

Spec comparison

Claude Haiku 4.5GPT-5.6 Terra
Price (input)$1.00/M$2.00/M
Price (output)$5.00/M$12.00/M
Blended price$2.00/M$4.50/M
Context window200,000 tokens400,000 tokens
Max output32,000 tokens128,000 tokens
Modalitiestext, visiontext, vision
Reasoning modeNoYes
Released2025-112026-06
Speed148 t/s78 t/s

Cost at scale (3:1 blended)

Tokens / monthClaude Haiku 4.5GPT-5.6 TerraDelta
1,000,000$2.00$4.50$2.50 (2.3×)
10,000,000$20.00$45.00$25.00 (2.3×)
100,000,000$200.00$450.00$250.00 (2.3×)

Choose Claude Haiku 4.5 if…

  • Fastest Claude model
  • Lowest Claude pricing
  • Vision input included
  • Lightweight, high-volume operations like chat, tagging, and moderation.

Choose GPT-5.6 Terra if…

  • Balanced cost-to-intelligence ratio
  • Reasoning mode available on demand
  • Same 400K context as Sol
  • Everyday production workloads that need strong quality without Sol-tier pricing.

Run this exact matchup right now

Send the same prompt to Claude Haiku 4.5 and GPT-5.6 Terra side by side and see the outputs yourself.

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FAQ

Is Claude Haiku 4.5 cheaper than GPT-5.6 Terra?

Claude Haiku 4.5 is cheaper, at $2.00 per million blended tokens vs $4.50 for GPT-5.6 Terra.

Which has the bigger context window, Claude Haiku 4.5 or GPT-5.6 Terra?

GPT-5.6 Terra has the larger context window: 400,000 tokens vs 200,000.

Can Claude Haiku 4.5 replace GPT-5.6 Terra for coding?

Both are viable for coding. Fastest Claude model (Claude Haiku 4.5) vs Balanced cost-to-intelligence ratio (GPT-5.6 Terra) — pick based on which strength matters more for your workload.

Which is faster, Claude Haiku 4.5 or GPT-5.6 Terra?

Claude Haiku 4.5 is faster: 148 t/s vs 78 t/s, measured on our speed benchmarks.

Related

Claude Haiku 4.5 pricingGPT-5.6 Terra pricingvs Grok 4.3vs Gemini 3.1 Provs Grok-4.20 Reasoningvs Gemini 3.6 FlashPremium model tests

Pricing verified 2026-04-06. Specs verified 2026-08-08.