Standard Compute
Model comparison 2026

GPT-5.3-Codex vs GPT-6 Sol

GPT-5.3-Codex
OpenAI · Balanced · Proprietary
$5.42/1M · 400K ctx
GPT-6 Sol
OpenAI · Balanced · Proprietary
$4.40/1M · 1.1M ctx

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

Specs and pricing side by side

Spec
GPT-5.3-Codex
GPT-6 Sol
Maker
OpenAI
OpenAI
Blended price / 1M
$5.42
$4.40
Input / output
$1.75 in · $14 out / 1M tokens
$2.00 in · $10 out / 1M tokens
Context window
400K
1.1M
Open weights
No
No
Tool use
Yes
Yes
Reasoning
Yes
Yes
Output Quality
8.8
9.4
Agentic Ability
9.3
9.4
Speed
7.8
8.2
Value for money
7.8
8.6
Reliability
8.7
9.2

Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).

Verdict: GPT-5.3-Codex or GPT-6 Sol?

Updated 2026-10-13

Choose GPT-5.3-Codex if you want codex CLI users and dedicated coding agents. Choose GPT-6 Sol if you want existing GPT-6 Sol setups and calls that need no-reasoning mode.

In our editorial scoring, GPT-6 Sol leads in 5 of five dimensions (output quality, agentic ability, speed, value for money and reliability), while GPT-5.3-Codex leads in 0. On price, GPT-5.3-Codex runs about $5.42 per 1M tokens (blended) and is proprietary; GPT-6 Sol is about $4.40 and proprietary.

Where GPT-5.3-Codex falls short
  • Narrower than a general flagship outside coding
  • Mid-tier pricing
Full GPT-5.3-Codex breakdown →
Where GPT-6 Sol falls short
  • Superseded by GPT-6.1 Sol, which scores higher at the same price
  • Cached input costs $0.20 per million, twice GPT-6.1 Sol
Full GPT-6 Sol breakdown →

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