Command A Plus vs GPT-5.3 Codex Spark vs GPT-5-Codex

GPT-5-Codex is the better all-round choice, scoring 42/100 against GPT-5.3 Codex Spark (38) and Command A Plus (35). It leads on price and context window. GPT-5.3 Codex Spark wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

GPT-5-Codex is cheaper at $1.25 input / $10.00 output per million tokens (median across 3 API providers). Command A Plus costs $2.50 input / $10.00 output per million tokens (official Cohere API price); GPT-5.3 Codex Spark costs $1.75 input / $14.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $3.44 per million tokens for GPT-5-Codex versus $4.38 for Command A Plus (1.3× as much) and $4.81 for GPT-5.3 Codex Spark (1.4× as much).

There is no independent benchmark that covers all three models yet. Command A Plus has not been scored yet, GPT-5.3 Codex Spark has not been scored yet and GPT-5-Codex has not been scored yet.

There are no published SWE-bench Verified results for Command A Plus, GPT-5.3 Codex Spark and GPT-5-Codex yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.

GPT-5-Codex has the largest context window at 400,000 tokens, against 128,000 for Command A Plus and 128,000 for GPT-5.3 Codex Spark. Maximum output per response: Command A Plus up to 64,000, GPT-5.3 Codex Spark up to 32,000, GPT-5-Codex up to 128,000 tokens.

Command A Plus accepts text and images; GPT-5.3 Codex Spark accepts text, images and PDFs; GPT-5-Codex accepts text and images. GPT-5.3 Codex Spark handles the widest range of inputs.

Command A Plus publishes its weights and can be self-hosted; GPT-5.3 Codex Spark and GPT-5-Codex is proprietary.

Command A Plus is the newest, released May 20, 2026. GPT-5.3 Codex Spark came out Feb 5, 2026; GPT-5-Codex came out Sep 15, 2025. Knowledge cutoff: Command A Plus Apr 1, 2025, GPT-5.3 Codex Spark Aug 31, 2025, GPT-5-Codex Sep 30, 2024.

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.