Cost per coding-agent request

Is Claude Sonnet 4.6 or GPT-5.6 Sol cheaper for coding agents?

For coding agents, GPT-5.6 Sol costs 1.7x as much as Claude Sonnet 4.6 per request ($0.17 vs $0.097 on our measured traffic), because Sol lists at $4/$20 against Sonnet 4.6's $3/$15 and doubles input over 272K tokens.

List prices: Anthropic pricing, OpenAI API pricing, checked 2026-10-13. Request costs: Standard Compute gateway data, 79,301 coding-agent requests from 75 users, Sep 13 to Oct 12, 2026. How we compute this

Run GPT-5.6 Sol and Claude Sonnet 5.5 in your agent

Or let the router send each step to the cheapest model that can do it, on providers we vet for price, uptime and speed. Plans from $19 a month.

See plans

Cost per coding-agent request, side by side

Cost at list price	Sonnet 4.6	GPT-5.6 Sol
Prompt under 100K tokens50% of requests, 87% of input cached	$0.047	$0.062
Prompt of 100K to 272K39% of requests, 88% of input cached	$0.12	$0.16
Prompt over 272K tokens11% of requests, 86% of input cached	$0.26	$0.68
Average request	$0.097	$0.17
100 requests	$9.74	$16.50
Median session16 requests; a session ends after 10 idle minutes	$1.35	$1.80
A month of regular usemedian of 20 users active on 5+ days	$149	$233

Each logged request priced at the vendor’s list rates for its own token counts, including cache reads and any higher rate for long prompts. Average output: 698 tokens per request.

Benchmarks, speed and latency, side by side

Artificial Analysis	Sonnet 4.6	GPT-5.6 Sol
Intelligence Index10 evaluations, 0 to 100	30	47
Terminal-Bench 4.0agentic coding in a terminal	3.0%	39.9%
Output speedmedian	57 tokens/s	94 tokens/s
Time to first answer tokenincludes thinking time	101 s	2.1 min

Source: Artificial Analysis (artificialanalysis.ai). Measured variants: Claude Sonnet 4.6 (Max), speed on Anthropic; GPT-5.6 Sol (Max), speed on OpenAI. Fetched October 13, 2026. Artificial Analysis runs Terminal-Bench 4.0 in its own setup, so its scores differ from the tbench.ai leaderboard.

FAQ

Is Claude Sonnet 4.6 cheaper than GPT-5.6 Sol for coding agents?

Yes, at list prices. 100 average coding-agent requests cost $9.74 on Claude Sonnet 4.6 and $16.50 on GPT-5.6 Sol. A median 16-request session costs $1.35 vs $1.80. Measured on 79,301 real coding-agent requests (Sep 13 to Oct 12, 2026).

How much does a month of GPT-5.6 Sol vs Sonnet 4.6 cost?

For the median regular user in our data (1,478 requests in 30 days), about $233 on GPT-5.6 Sol and $149 on Claude Sonnet 4.6 at list price. Heavier users pay proportionally more.

Claude Sonnet 4.6 vs GPT-5.6 Sol: which is better for agents?

GPT-5.6 Sol scores higher on output quality (8.6/10 vs 6.4/10), while GPT-5.6 Sol is the cheaper option. Claude Sonnet 4.6 is best for existing Sonnet 4.6 setups until they move to Sonnet 5.5; GPT-5.6 Sol is best for existing GPT-5.6 Sol setups until they move to GPT-6.1 Sol. Live community votes on this page show what people actually prefer.

Can I switch between Claude Sonnet 4.6 and GPT-5.6 Sol in the same agent?

Yes. Model-agnostic agents (Cline, Aider, OpenClaw, Hermes Agent, Kilo Code, OpenCode) let you swap models per task. Many people route hard tasks to the stronger model and routine work to the cheaper one.

Community vote

Pick a winner in each dimension. You can change your vote any time.

Output Quality

Correctness and depth of what it produces

Agentic Ability

Tool calls, instruction-following, and multi-step tasks

Speed

Tokens per second and time-to-first-token

Value for Money

How much capability you get per dollar

Reliability

Consistent results: fewer refusals, loops and format breaks

Current Claude, GPT, Gemini and open models run on Standard Compute

Standard Compute

Current frontier models Claude Fable 5.1 · GPT-6 Astra

More intelligence
per dollar.

Each step goes to the cheapest model that can do it, on providers we vet for price, uptime and speed, with automatic fallback when one fails.

Compliance: Opt-in rules keep a company, team or key on European or US providers
Privacy: We don’t train on your prompts or store them

Get your API key See how it works

Fixed monthly plans from $19 · cancel anytime

7-day fair refund Free trial, no card Billing by Stripe1,800+ agent users

Is Claude Sonnet 4.6 or GPT-5.6 Sol cheaper for coding agents?

Cost per coding-agent request, side by side

Benchmarks, speed and latency, side by side

What to watch for

FAQ